Glossary

Plain definitions of the contract, AP and freight terms that decide whether an invoice can be checked.

260 pages

• Absolute minimum charge: paying for a floor you didn't useAbsolute minimum charge is the floor a vendor bills regardless of actual usage. Learn how it differs from a volume tier and where it drifts.
• Accessorial charge creep: what small fees add up toAccessorial charge creep is the gradual expansion of carrier add-on fees past their contracted trigger condition. What it is and how to catch it.
• Accrual reversal: how an overstated expense gets correctedGlossary page defining accrual reversal, its link to margin drift, timing risk, and detection method, with FAQ and DefinedTerm-ready structure.
• Address correction fee: what a bad ship-to address costsAddress correction fee: what it is, what triggers it, and how it hides in accessorial detail lines on freight and parcel invoices. Read the full guide.
• Approval matrix: how sign-off limits get bypassedGlossary definition of an approval matrix: what it is, why it exists, and how it relates to margin drift and contract compliance in AP. Read the full guide.
• Audit observation: how it differs from a findingAudit observation defined: the documented, evidence-backed finding an invoice-to-contract audit produces before it becomes a recovery claim.
• Auto-renewal clause: how it locks in stale contract termsGlossary page defining the auto-renewal clause and its role in margin drift for service vendor contracts. Part of the ValueXPA margin drift library.
• Base rate discount: the savings lost when it's misappliedGlossary definition of base rate discount, the negotiated percentage off a vendor's rate card, and how it drifts silently on service vendor invoices.
• Bill of lading: its role in freight invoice auditsBill of lading defined: the carrier's pickup record of weight, class and terms, and how AP teams use it to catch freight invoice discrepancies.
• Blocked invoice: how a mismatch stops paymentGlossary definition of "blocked invoice", the AP hold status that stops payment when an invoice fails a match check, with causes and how it differs from.
• Catalog buying: how off-contract items reach the invoiceCatalog buying is a purchasing method where the buyer orders against a vendor's pre-agreed price list rather than negotiating each order. Read the full guide.
• Category management: how grouped spend hides missed savingsGlossary definition of category management: how spend is grouped by vendor type, why the grouping choice determines what a contract audit actually catches.
• Change order: what it actually authorizes on an invoiceGlossary page defining "change order" in AP/contract audit context, covering how it creates margin drift, verification steps, and links to related drift-type.
• Chart of accounts: how mapping errors hide chargesGlossary definition of chart of accounts: structure, role in AP audits, and how it relates to margin drift detection across GL categories. Read the full guide.
• Claim recovery: how refunds get chased and reclaimedClaim recovery: what it means when a documented vendor overcharge is submitted and returned as cash or credit, not just flagged internally. Read the full guide.
• Claim substantiation: what you owe proof of before paymentClaim substantiation is the evidence standard, contract clause, invoice line, and calculation, that proves a margin drift finding before it reaches a vendor.
• Compensating control: how a gap gets covered another wayA compensating control catches errors after the fact, when the control designed to prevent them at source is missing or fails. Written for finance and AP teams.
• Compliance rate: what low scores cost in vendor dealsCompliance rate defined: what it measures, why a high score can hide margin drift, and how it differs from a dollar-based drift finding. Read the full guide.
• Continuous controls monitoring: catching drift liveGlossary definition of continuous controls monitoring, contrasted with periodic audit, for AP and controller teams at $100M+ manufacturers. Read the full guide.
• Contract labor and staffing audit: checking billed hoursContract labor and staffing audit: definition, what errors it catches, and how ValueXPA's fixed-scope Margin Drift Diagnostic finds recoverable spend.
• Contract utilization: what unused commitments cost youContract utilization is the rate at which invoices actually reflect a service contract's rate card, volume tiers, and terms, rather than list price or a.
• Cost avoidance: how a saving is counted without a refundCost avoidance is spend a company never pays because a control catches an incorrect charge before invoice approval, distinct from a paid-invoice recovery.
• Cost-plus pricing: how markup sits on actual costCost-plus pricing bills a vendor's cost plus a fixed markup. Learn how the model works and where it hides drift in a service contract. Read the full guide.
• Currency conversion variance: how FX shifts invoice costCurrency conversion variance is the gap between a contract's specified FX rate and the rate a vendor actually bills. Definition, mechanism, and test.
• Deduction management: how a short payment gets appliedGlossary definition of deduction management, covering process, mechanics, and why unresolved deductions relate to margin drift. Read the full guide.
• Delivery area surcharge: what you pay for remote stopsDelivery area surcharge definition: what triggers it, how it differs from fuel and accessorial charges, and how to audit it against a carrier's rate card.
• Density-based pricing: how cargo density sets costDensity-based pricing sets freight class by pounds per cubic foot. Learn how it works, how it hits invoices, and how to tell it apart from margin drift.
• Detective control: what catches an error after it happensA detective control finds errors that already occurred, like a contract compliance audit that catches invoice charges a preventive check let through.
• Detention charge: how dock delay turns into a feeDetention charge is the fee a carrier bills when a truck waits at a dock past the contract's free time. Here is how it is defined, checked, and disputed.
• Direct spend: what you lose without vendor visibilityDirect spend is money paid for materials and components that become part of a finished product, distinct from indirect spend on services and supplies.
• Dual sourcing: what you pay to keep a backup supplierDual sourcing means two vendor contracts per category. Learn what it is and how it creates margin drift if invoices aren't matched to the right contract.
• Duplicate freight bill: how one shipment is billed twiceGlossary definition of duplicate freight bill: how the same shipment gets billed twice and how it differs from duplicate payment. Read the full guide.
• Duplicate payment: how one invoice gets paid twiceDuplicate payment is a second disbursement made against a vendor invoice already paid in full. Learn how it happens, why AP controls miss it, and how it's.
• Dynamic discounting: how the rate moves with pay dateGlossary page defining dynamic discounting, its mechanics, and how it differs from fixed early-payment terms, for US industrial manufacturers evaluating AP.
• Early payment discount: what you gain by paying earlyEarly payment discount definition: what a term like 2/10 net 30 means, why it gets missed, and how it differs from a rebate or credit memo in AP audits.
• Equipment rental audit: what unreturned gear keeps costingAn equipment rental audit checks rented-equipment invoices against the rental agreement's rate, term, and fees to identify margin drift and recoverable spend.
• Escheatment: what happens to unclaimed vendor creditsEscheatment defined for AP and finance teams: what it means, how it starts with unclaimed vendor credits, and why margin drift audits surface it.
• Evaluated receipt settlement: matching PO, not invoiceEvaluated receipt settlement pays vendors from the PO and receipt alone, skipping the invoice. Here is what it changes for margin drift. Read the full guide.
• Evergreen clause: how contracts renew without a signatureAn evergreen clause is a contract term that auto-renews an agreement unless one side cancels by a deadline. Definition, risk, and how to review one.
• Facilities and janitorial audit: paying for unclean spaceFacilities and janitorial audit defined: what it covers, how billing drift enters cleaning and facilities services contracts, and how it fits an AP recovery.
• Freight and 3PL audit: what carrier billing errors costFreight and 3PL audit definition: how it finds rate, accessorial, and surcharge errors against contract terms in freight invoices for manufacturers.
• Freight bill audit: how carrier overcharges get caughtFreight bill audit checks carrier invoices against contracted rates, fuel surcharges, and accessorials line by line. Learn the method and error types.
• Freight invoice audit: catching charges you didn't orderFreight invoice audit definition: how it checks carrier invoices against rate cards, fuel surcharges, and accessorial terms to catch margin drift.
• Freight payment: how carrier invoices get processedFreight payment is the process of auditing, approving and disbursing carrier invoices against rate and contract terms before payment posts. Read the full guide.
• Freight-all-kinds rate: one price for mixed cargoFreight-all-kinds (FAK) rate defined: what it covers, why it drifts from contract terms, and how to check it against a carrier invoice. Read the full guide.
• Fuel surcharge index: the benchmark behind fuel feesGlossary definition of the fuel surcharge index: what it is, how it is set, and why misapplication drives freight margin drift. The index itself is neutral.
• Fuel surcharge table: how fuel fees scale by mileageGlossary definition of the fuel surcharge table, how it works, how drift enters it, and how to verify one against carrier invoices. Read the full guide.
• Fuel-adjusted rate: how fuel cost changes shipping priceA fuel-adjusted rate is a freight rate that moves with a published fuel index. See how the formula works and where it drifts on invoices. Read the full guide.
• General ledger coding: how invoice costs hit your booksGeneral ledger coding glossary definition covering account mapping, audit relevance, and drift detection for finance teams reviewing vendor invoices.
• General rate increase: how carriers raise base costGlossary definition of general rate increase, the annual across-the-board carrier price hike, and how it differs from legitimate versus drifted invoice charges.
• Gross margin: what's left after cost of goods soldGross margin is revenue minus cost of goods sold as a percentage of revenue. See how vendor invoice errors erode it without any price change.
• Index escalation clause: how prices adjust automaticallyAn index escalation clause ties contract pricing to a published index. Learn how it works, where it hides margin drift, and how to audit it correctly.
• Index escalation misapplied: wrong index inflates costIndex escalation misapplied means a vendor's price increase no longer matches the index clause it cites. Learn how to catch it on invoices. Read the full guide.
• Inside delivery fee: what you pay to get past the dockGlossary definition of inside delivery fee, a freight accessorial charge, its billing basis, and how it drifts from contract terms on carrier invoices.
• Intermodal: how freight moves between truck and railIntermodal means freight moves across multiple transport modes under one contract. Here is what it means for rate audits and invoice matching.
• Invoice aging: how overdue invoices stay openInvoice aging sorts unpaid invoices by days outstanding for cash management. It does not check invoices against contract terms, where margin drift hides.
• Invoice matching tolerance: how small mismatches passGlossary definition of invoice matching tolerance, its role in margin drift, and how it differs from a rate card check. Written for finance and AP teams.
• Key control: how one review step catches invoice errorsKey control: the specific check inside AP or contract review that would have caught a given margin drift error before payment. Written for finance and AP teams.
• Leakage: how contract value slips out of savingsLeakage is the dollar loss from invoices paid above contract terms. Definition, measurement basis, causes, and how to find and stop it. Read the full guide.
• Liftgate fee: what you pay for a lift-equipped truckA liftgate fee is a freight accessorial charge for a truck's hydraulic lift when a delivery has no loading dock. Here is when it applies. Read the full guide.
• Limited access fee: what you pay for hard-to-reach sitesA limited access fee bills for delivery constraints like gate codes or narrow docks. See when it's contractual and when it's margin drift. Read the full guide.
• Lumper fee: what you pay for someone else's dock crewA lumper fee is the charge for third-party dock labor that unloads a truck, billed apart from freight. Here is how it should be capped, receipted and checked.
• Margin erosion: how contract drift shrinks profitMargin erosion is the gradual loss of profit margin from billing gaps and cost pressure. Defined, with how it accumulates and how to find it.
• Master service agreement: how it governs every orderGlossary definition of Master Service Agreement, its role in margin drift and how vendor contracts are structured for services procurement. Read the full guide.
• Maverick spend: how purchases skip the contractMaverick spend is purchasing that bypasses approved vendors or contracts entirely, leaving invoices with no negotiated terms to check against.
• Minimum commitment shortfall: what unshipped volume costsDefinition of minimum commitment shortfall, the gap between a minimum volume commitment and actual purchases, and how it turns into unclaimed contract value.
• Mode optimization: what shipping the wrong mode costsMode optimization is the choice of transport or service mode for a shipment. In audit terms, an undocumented mode switch is where margin drift hides.
• Most favored nation clause: why you may pay more than othersWhat a most favored nation clause means in a vendor contract, how it is meant to work, and why invoices drift from it unnoticed. Read the full guide.
• N-way invoice matching: how documents get cross-checkedN-way invoice matching compares an invoice against internal purchasing documents. Here is what each tier checks, and what it cannot catch against a contract.
• Not-to-exceed cap: how a price ceiling gets breachedNot-to-exceed cap is the contractual ceiling on vendor billing. See what it covers, why standard AP matching misses overruns, and how to track it.
• Not-to-exceed overrun: what you pay above the capA not-to-exceed overrun is an invoice or billing total that exceeds a contract's NTE cap and gets paid without the cap being enforced. Read the full guide.
• Off-contract spend: how purchases bypass the agreementOff-contract spend: definition, causes, detection, and how it differs from related drift types, for AP and procurement leads at $100M+ manufacturers.
• Overbilling: how an invoice charges more than owedOverbilling means the invoiced amount exceeds what the contract permits. Definition, common causes, and how it differs from a legitimate price increase.
• Parcel audit: how shipping invoices get checked for errorsParcel audit is a review of small-package shipping invoices against carrier agreements to recover overcharges and fix billing errors going forward.
• Pass-through cost: how vendor costs pass straight to youPass-through cost is a third-party charge a vendor bills to you at cost or at a stated markup. Learn how unverified pass-through terms create margin drift.
• Payment run: how invoices get grouped for paymentGlossary definition of payment run, the batch process where AP releases approved invoices for payment, and why it is the last checkpoint before margin drift.
• Peak season surcharge: what you pay for high demandGlossary page defining peak season surcharge, its mechanics, and how to audit it against contract terms for margin drift. Written for finance and AP teams.
• Pre-audit: how errors get caught before paymentPre-audit ranks vendor contracts by spend and documentation gaps before a full invoice-to-contract review, focusing audit hours where they matter.
• Price file governance: how price lists stay accuratePrice file governance is the discipline of keeping vendor price files synced to contract terms. See what breaks it and how to control it. Read the full guide.
• Profit leakage: how margin slips out of a contractProfit leakage is margin lost after the sale, through billing errors rather than pricing. Learn its causes, where it surfaces, and how it is found.
• Purchase price variance: how paid price drifts from POPurchase price variance compares an invoice to a standard cost. Margin drift compares it to the contract. Here's why that difference matters.
• Rebate clause: how volume discounts get earned backA rebate clause sets the conditions under which a vendor returns part of your spend as a credit. Learn how it is triggered and where drift hides.
• Rebate gap: what happens when earned rebates go unpaidRebate gap is the difference between rebates a vendor contract entitles you to and rebates actually credited. Definition, causes, and detection.
• Rebill: how a corrected invoice replaces the originalGlossary definition of "rebill" in vendor invoicing: what it means, how it differs from a correction, and where it creates margin drift risk in service vendor.
• Reconsignment fee: what you pay to redirect a shipmentA reconsignment fee is a carrier charge for rerouting a shipment in transit. Here is when it is legitimate and how it shows up as margin drift.
• Recovery audit: how vendors get paid overcharges backRecovery audit definition: a retrospective review of paid vendor invoices to find and recover overpayments, duplicate payments, and missed credits.
• Redelivery fee: what you pay when the first drop failsRedelivery fee: definition, contract basis, and how AP teams verify whether a second delivery charge was actually owed before paying it. Read the full guide.
• Redline: Contract Term Definition | ValueXPAGlossary definition of "redline" in vendor contract markup, covering how it differs from margin drift and where it fits an audit. Read the full guide.
• Remediation plan: how you fix repeat contract violationsA remediation plan lists each margin drift finding, the fix, and the owner. See how ValueXPA structures one after a diagnostic. Read the full guide.
• Request for proposal: how vendors bid on your scopeGlossary definition of request for proposal (RFP) in vendor contracting, framed for margin drift and contract audit context. Written for finance and AP teams.
• Requisition: what triggers a purchase before the POA requisition is the internal request to purchase, made before a PO or vendor price exists. See what it authorizes and where it creates audit exposure.
• Residential delivery fee: what home drop-offs costA residential delivery fee is a carrier surcharge for shipments to a home address. Learn how it is defined, billed, and checked against contract terms.
• Retainage: how a percentage of payment gets held backRetainage is a portion of a contract payment a customer withholds from a vendor's invoice until a project or milestone is confirmed complete, then pays out.
• Reverse auction: how suppliers bid prices down liveA reverse auction sets a low award price through competitive bidding. Whether that price holds depends on invoice-to-contract checks after the event.
• Risk register: what unresolved risks cost you laterA risk register is a logged inventory of specific vendor risks. Definition, use in margin drift work, and how it differs from a findings log.
• Rogue spend: how purchases skip approved contractsGlossary definition of rogue spend: unauthorized or off-contract purchasing that bypasses procurement controls and creates margin drift risk.
• Root cause analysis: how you trace an error to its sourceRoot cause analysis traces a billing discrepancy back to the process failure that caused it. Definition, mechanism, and why findings need it to stop recurring.
• Routing guide: what carrier rules you must followA routing guide sets which carrier and service level applies before a shipment moves, and it is the reference point contract compliance audits check freight.
• Sampling methodology: how auditors pick invoices to checkGlossary definition of sampling methodology in a margin drift diagnostic, covering coverage logic, statistical basis, category weighting, and validation.
• Savings leakage: where negotiated discounts quietly vanishSavings leakage is the gap between reported procurement savings and the savings that actually reach invoices over the life of a vendor contract.
• Self-billing: how the buyer generates the invoiceSelf-billing lets the buyer generate the vendor invoice. Learn what it is, why companies use it, and where pricing errors can hide inside it.
• Shift and overtime premium misuse: how labor costs inflateShift and overtime premium misuse is a contract labor drift type: a vendor bills a shift or overtime multiplier the labor contract does not authorize.
• Small parcel surcharge: what you pay per shipmentA small parcel surcharge is an added charge a carrier applies to a package shipment beyond the base rate, tied to a specific service condition on the invoice.
• Sole source: how one vendor becomes your only optionSole source defined: a contract clause naming one approved vendor for a category, and how it becomes a margin drift risk if left unchecked. Read the full guide.
• Source-to-Pay (S2P): What It Means and IncludesSource-to-pay covers sourcing, contracting, purchasing, invoicing and payment as one connected process, and it is where margin drift enters unnoticed.
• Spend taxonomy: how purchases get grouped for analysisSpend taxonomy groups vendor spend by category and contract mechanism, not general ledger account, so each invoice maps to the right audit check.
• Spend under management: what slips through uncontrolledGlossary definition of spend under management, the share of vendor spend actively tracked against contract terms rather than paid on trust. Read the full guide.
• Spot rate: how freight pricing moves shipment to shipmentSpot rate definition: a price set for a single shipment or short window, negotiated outside any standing contract or rate card. Read the full guide.
• Statement reconciliation: catching charges before they postStatement reconciliation matches a vendor's statement to your AP ledger to confirm both agree on invoices, payments and credits. Read the full guide.
• Straight-through processing: how invoices skip manual reviewStraight-through processing automates invoice payment against a purchase order match. Here is what it checks, what it misses, and why that gap matters.
• Supplier risk assessment: what a bad vendor can cost youSupplier risk assessment defined: what it covers, why billing drift is a risk signal scorecards miss, and where invoice-level review fits in.
• Supplier scorecard: how vendor performance gets trackedA supplier scorecard rates vendor performance, not billing accuracy. See what it measures, what it misses, and how to pair it with a compliance check.
• Tariff: the import cost that lands on your invoiceWhat a tariff is on a service vendor invoice, how it differs from a rate card, and why unreviewed tariff terms create margin drift. Read the full guide.
• Tax code mismatch: how the wrong rate slips into an invoiceTax code mismatch is a margin drift type where an invoice applies the wrong sales, use or VAT tax code against the contracted terms. Read the full guide.
• Termination for convenience: the exit cost you agreed toTermination for convenience lets either party end a service contract without cause. Learn how notice periods and wind-down billing create invoice exposure.
• Third-party logistics provider: how outsourced freight worksWhat a third-party logistics provider is, what it bills for, and where its invoices diverge from the contract governing the freight. Read the full guide.
• Three-way match: how invoice, PO, and receipt must alignThree-way match compares invoice, purchase order and receipt. Learn what it catches, what it misses, and how it relates to margin drift. Read the full guide.
• Tiered pricing: how your rate changes with volumeTiered pricing sets different unit rates at different purchase volumes. Learn how the tiers are defined, applied, and where they slip on an invoice.
• Time and materials: how billing tracks hours and partsTime and materials is a billing method charging actual labor hours and materials cost. Learn the rate card and cap terms that keep it auditable.
• Two-way match: how invoice and PO get comparedTwo-way match compares invoice to purchase order only. Learn what it checks, what it misses, and how it differs from three-way match. Read the full guide.
• Unapplied credit: cash sitting unmatched to any invoiceGlossary definition of unapplied credit, the AP recovery scenario where issued vendor credit memos never offset an invoice or payment. Read the full guide.
• Unit of measure mismatch: paid per case, billed per eachUnit of measure mismatch is a margin drift type where an invoice bills quantity in a different unit than the contract's rate is priced on. Read the full guide.
• Unit rate contract: pay per unit regardless of volumeGlossary definition of unit rate contract for ValueXPA, explaining structure, verification, and drift risk without unsourced numbers. Read the full guide.
• Variance analysis: how expected and actual costs divergeGlossary definition of variance analysis: comparing invoiced charges to contract terms to isolate margin drift, its inputs, limits, and relation to the audit.
• Vendor consolidation: what it fixes and what it doesn'tVendor consolidation reduces suppliers to gain scale pricing, but it does not remove the need to match a consolidated contract's terms against invoices.
• Vendor master hygiene: what a stale vendor file costs youVendor master hygiene keeps vendor records accurate so duplicate payments, misdirected remittances, and stale rate terms stop reaching the invoice.
• Vendor statement: how a vendor reports what you oweGlossary definition of a vendor statement: what it is, how it differs from an invoice, and why it matters for margin drift audits. Read the full guide.
• Volume tier misapplication: billed above the tier you hitVolume tier misapplication is when a vendor bills at a lower discount tier than the volume purchased actually earned. Here's how it happens and how it's caught.
• Walkthrough testing: tracing one invoice, step by stepWalkthrough testing traces one transaction end to end through AP process controls to confirm each step is followed as designed, before broader testing begins.
• What are Incoterms?Incoterms define who pays freight, insurance and duty and where risk transfers. See how the wrong term hides freight overbilling on invoices.
• What are liquidated damages?Liquidated damages defined: a pre-agreed contract penalty for late or nonconforming vendor performance, and how it differs from an invoice error.
• What are payment terms?Payment terms define when an invoice is due and what discounts or penalties apply. Learn how misapplied terms create margin drift on AP invoices.
• What counts as a budget variance?Budget variance is the gap between what a finance team planned to spend and what it actually spent; on service vendor invoices, part of that gap is margin.
• What counts as a carrier rate agreement?What a carrier rate agreement is, what terms it sets, and how it is checked line by line against freight invoices to catch margin drift before payment.
• What counts as a contract compliance audit finding?A glossary definition of contract compliance audit: what it checks, how it differs from AP recovery, and where drift is caught. Read the full guide.
• What counts as a control gap in an audit?A control gap is the missing check in an approval workflow that would have tested an invoice against a specific contract term before payment.
• What counts as a cost center in vendor billing?Cost center defines the accounting unit finance uses to track vendor spend, and why that boundary determines whether margin drift ever gets noticed.
• What counts as a credit memo?A credit memo definition for AP and finance teams: what it is, who issues it, why it matters, and how unapplied credits become margin drift.
• What counts as a debit memo?Debit memo, defined: what it adjusts, how it differs from an invoice and a credit memo, and why unresolved ones hide uncollected balances. Read the full guide.
• What counts as a duplicate vendor record?A duplicate vendor record is a second ERP master entry for one vendor. Learn how it hides margin drift and enables duplicate payments. Read the full guide.
• What counts as a fixed-scope audit?A fixed-scope audit is a contract compliance and recovery review priced as one flat fee for a defined vendor set and time period, agreed before work begins.
• What counts as a goods receipt note?A goods receipt note confirms delivery quantity, not price. See what it covers, how it fits three-way matching, and where it misses margin drift.
• What counts as a management review control?Glossary definition of management review control: what it is, how it works in AP, and its limits against margin drift. Written for finance and AP teams.
• What counts as a materiality threshold?Glossary definition of materiality threshold, the spend-review cutoff finance teams set to focus audit effort on findings worth pursuing. Read the full guide.
• What counts as a missed credit memo?Missed credit memo: a vendor credit issued but never applied against an invoice, leaving cash owed to the buyer sitting unrecovered. Read the full guide.
• What counts as a parked invoice?Definition, capsule and body copy for the glossary page defining what a parked invoice is and why it matters for margin drift detection. Read the full guide.
• What counts as a post-audit?Post-audit definition: reviewing paid invoices against vendor contracts to recover overcharges. What it covers, its timing, and its limits. Read the full guide.
• What counts as a preferred supplier?Preferred supplier defined: what the designation means, what it does not guarantee, and how it relates to margin drift and invoice review. Read the full guide.
• What counts as a reclass entry?Reclass shifts a charge into a different cost or GL category so the invoice line no longer maps to its contract clause during matching. Read the full guide.
• What counts as a request for information (RFI)?Glossary definition of a Request for Information (RFI) in vendor contract and invoice auditing, covering when and how it is used and its limits versus a full.
• What counts as a segregation of duties violation?Segregation of duties splits AP tasks across people so no one can create and hide an overpayment or contract violation alone. Written for finance and AP teams.
• What counts as a service level agreement breach?Glossary definition of service level agreement covering scope, tie to margin drift, and how SLA terms get audited against invoices. Read the full guide.
• What counts as a spot buy?Glossary definition of "spot buy": a one-off purchase made outside a standing vendor contract, and why it complicates margin drift review. Read the full guide.
• What counts as a telecom and connectivity audit?Glossary definition of telecom and connectivity audit, covering scope, contract terms checked, and how it fits within a broader margin drift diagnostic.
• What counts as a test of operating effectiveness?A test of operating effectiveness checks whether a contract control, like a rate cap or rebate trigger, actually functioned across every invoice, not just on.
• What counts as a touchless invoice?Glossary definition of touchless invoice: automated processing with no human review, its limits on contract terms, and why it can mask margin drift.
• What counts as a valid claim in a vendor dispute?A claim is a documented assertion that a specific invoice charge conflicts with contract terms, submitted to a vendor for credit, refund, or correction.
• What counts as a valid release order?A release order is a call against a standing agreement, not a new contract. See how it should price, and where drift creeps into it. Read the full guide.
• What counts as a vendor record?A vendor record is the stored data set an ERP or AP system holds about a supplier, including identity, terms and any linked contract or rate card.
• What counts as a volume tier?A volume tier is a pricing structure where a vendor's unit rate changes once purchase quantity crosses a contracted threshold, up or down. Read the full guide.
• What counts as a weight break in freight billing?Weight break is the shipment-weight point where a lower freight rate tier applies. See how misapplied breaks quietly inflate invoices. Read the full guide.
• What counts as an accrual in AP?Glossary definition of accrual: what it is, how it works in AP, and why it matters for spotting margin drift before invoices reconcile against contract terms.
• What counts as an audit finding?An audit finding is a documented, dollar-valued mismatch between an invoice and its governing contract clause. Here is what qualifies and what happens next.
• What counts as an escalation cap?An escalation cap limits how much an index-linked contract rate can rise per period. Learn how it works and where invoices drift past it. Read the full guide.
• What counts as an indirect spend audit?Glossary definition of indirect spend audit: scope, method, and how it differs from a general AP review, for US industrial manufacturers above $100M.
• What counts as an invoice exception?Invoice exception is an AP flag raised when an invoice fails a PO, receipt, or approval check, distinct from confirmed margin drift against contract terms.
• What counts as an overcharge claim?An overcharge claim is a documented vendor request for a refund, citing the contract term violated, invoices affected, and dollar amount owed.
• What counts as billed scope beyond contract?Billed scope beyond contract is when an invoice charges for work, resources, or items outside the agreed statement of work or rate card. Read the full guide.
• What counts as complete supplier onboarding?Glossary definition of supplier onboarding and why weak onboarding lets margin drift start before the first invoice is ever cut. Read the full guide.
• What counts as consolidation in vendor billing?Glossary definition of consolidation in vendor invoice auditing, explaining how billing rollups can hide margin drift from CFOs and AP teams at industrial.
• What counts as delegation of authority?Delegation of authority defines who can approve spend and contract terms. Learn how gaps in it let margin drift pass through AP unchallenged.
• What counts as dimensional weight?Dimensional weight bills freight by cubic space, not scale weight. Learn the formula, the divisor, and how invoices drift from contracted terms.
• What counts as freight settlement versus payment?Glossary definition of freight settlement: the process of reconciling a carrier invoice against the rate and accessorial terms it was contracted under.
• What counts as full population testing in an audit?Glossary definition of full population testing: auditing every invoice line against contract terms rather than a sample, and why that matters for margin drift.
• What counts as goods received not invoiced?Goods received not invoiced (GRNI) is the accrued liability for received goods with no matching vendor invoice yet. Here is what it is and why it ages.
• What counts as invoice received not received?Invoice received not received is the AP state where an invoice arrives before its matching receipt is logged, blocking three-way matching until receiving.
• What counts as negotiated savings?Negotiated savings defined: the contracted rate reduction procurement signs, and why it can diverge from what a company's invoices actually reflect.
• What counts as operating expenditure?Glossary definition of operating expenditure, its role in service vendor spend, and how it relates to margin drift auditing. Written for finance and AP teams.
• What counts as price tolerance?Glossary definition of price tolerance in vendor contract auditing: how the variance band is set, why it exists, and where it hides margin drift.
• What counts as purchase requisition approval?Glossary definition of purchase requisition approval, its role in AP workflow, and how it differs from contract compliance checks that catch margin drift.
• What counts as quantity tolerance?Quantity tolerance is the variance a contract allows between ordered and invoiced quantities before the gap counts as a billing error. Read the full guide.
• What counts as realized savings?Realized savings is the dollar amount actually recovered or avoided after a margin drift finding is confirmed, not the figure a report first identifies.
• What counts as routing guide compliance?Glossary definition of routing guide compliance: what it is, why carriers deviate, how it differs from margin drift, and how it's verified against contract.
• What counts as single source?Glossary definition of "single source," the practice of buying a category from one vendor without competitive rebid, and how it shows margin drift.
• What counts as supplier qualification?Supplier qualification defined: the vendor review that sets the rate card, scope, and escalation terms later invoice audits depend on. Read the full guide.
• What counts as the contract rate on an invoice?A contract rate is the price a vendor agreement specifies for a unit of service. Learn where it lives in a contract and why it must match the invoice.
• What counts as underbilling versus a billing error?Underbilling is when a vendor invoice charges less than the contract allows. Definition, causes, and why it still creates financial risk for buyers.
• What determines a shipment's freight class?Freight class guide: NMFC-based LTL rating, disputes, and reclassification billing impacts for AP and procurement teams. Written for finance and AP teams.
• What do freight terms mean for who pays and when?Freight terms fix who pays the carrier and when title transfers. Learn how they differ from a rate card and where AP invoice review misses them.
• What does a freight forwarder actually do?A freight forwarder arranges shipping and customs on a shipper's behalf. See how its bundled invoices are structured and where margin drift enters them.
• What falls inside the tolerance threshold?A definition of tolerance threshold: the variance a contract audit allows before a billed rate counts as a violation rather than rounding noise.
• What is a benchmark clause in a service contract?A benchmark clause ties vendor pricing to an external reference like a market index or peer survey. Here's how it works and where drift hides.
• What is a blanket purchase order?A blanket purchase order is a standing agreement fixing vendor pricing and terms for repeat orders. Here is how it works and where it drifts.
• What is a buying channel in vendor contracts?Buying channel definition: the route a purchase takes to a vendor, and why mismatched channels let margin drift hide from AP review. Read the full guide.
• What is a calibration and safety compliance audit?A calibration and safety compliance audit checks vendor invoices for calibration and safety services against contract terms, certificates and schedules.
• What is a carrier contract in freight audits?A carrier contract sets the rates and terms a freight invoice must be checked against. Here is what it covers and where drift starts. Read the full guide.
• What is a chargeback, and who ends up paying?Glossary definition of chargeback in vendor invoicing, covering causes, evidence, and detection for margin drift audits. Written for finance and AP teams.
• What is a clause library, and why keep one?A clause library is a structured set of contract clause types tagged for automatic invoice matching. See how it supports margin drift review.
• What is a contingency fee audit, and how it's paid?Contingency fee audit defined: a recovery audit paid as a percentage of findings, compared with fixed-scope pricing where the client keeps every dollar.
• What is a contract addendum, and does it bind you?A contract addendum amends a vendor agreement's terms. Learn what it changes, why it causes margin drift, and how to track it against invoices.
• What is a contract repository, and who maintains it?A contract repository stores vendor contracts and rate cards centrally, but storage alone does not catch margin drift; see what it does and does not do.
• What is a control owner, and what's their job?Control owner: the person accountable for checking one contract clause, like a rate card or NTE cap, against invoices so margin drift is caught.
• What is a firm-fixed-price contract?Firm fixed price is a contract type that sets one price regardless of the vendor's actual cost. See how it changes what an invoice audit checks.
• What is a freight claim for damaged or lost cargo?Freight claim, defined: what it means in a service vendor contract, how it differs from a diagnostic finding, and where it fits. Read the full guide.
• What is a freight lane in carrier pricing?Glossary definition of freight lane, the origin-destination pairing carriers price and contract against, and where drift hides in lane-level freight billing.
• What is a fuel surcharge on a freight invoice?Fuel surcharge definition: what it is, how carriers calculate it, and how a stale index rate becomes hidden margin drift on freight invoices.
• What is a linehaul rate?Linehaul rate is the base carrier charge before fuel surcharges and accessorials. Learn how it's set, why it matters, and how audits verify it.
• What Is a Maintenance and Repair Audit?A maintenance and repair audit checks MRO and repair invoices against vendor contracts and rate cards to find billing errors and recoverable overcharges.
• What is a minimum charge?A glossary definition of minimum charge, explaining how this contract clause creates margin drift when invoices bill below the floor but still show it.
• What Is a Minimum Volume Commitment (MVC)?A minimum volume commitment is a contract clause setting a purchase floor; missing the floor or misapplied thresholds are a recurring source of margin drift.
• What is a packaging and corrugate audit?Packaging and corrugate audit definition: what it reviews, why packaging invoices drift from contract terms, and when manufacturers should run one.
• What is a preventive control?A preventive control stops an incorrect invoice from being paid before it posts, unlike an audit that finds the error afterward. Read the full guide.
• What Is a Price File? Definition for AP TeamsA price file is the vendor-maintained record of contracted prices used to check invoices for accuracy. Learn what it is and why it drifts from invoices.
• What is a punchout catalog?A punchout catalog definition: how vendor-hosted checkout sessions feed procurement systems, and why the price shown can drift from the signed contract.
• What is a purchase order?A purchase order is a buyer's document authorizing a purchase at a set price and quantity. See how it relates to rate cards and invoice matching.
• What Is a Rate Card? DefinitionA rate card is the vendor's contracted price list for services, covering unit prices, tiers, and surcharges. It is the baseline every invoice should match.
• What is a receiving discrepancy?Receiving discrepancy definition: a gap between the receiving record and the invoice quantity or condition. What it means and why it matters for AP.
• What is a request for quotation?Request for quotation (RFQ): a buyer's document asking vendors to price a defined scope. Definition, how it feeds the rate card, and why it matters later.
• What is a reweigh?A reweigh is a carrier's re-measurement of a shipment's weight after pickup. Learn how it works, why it drives margin drift, and how to verify one.
• What is a should-cost model?A should-cost model is an independent, bottom-up estimate of a fair price, built for sourcing and negotiation, not for auditing signed vendor invoices.
• What is a spend cube?Glossary definition of "spend cube" for procurement and AP audiences, explaining the three-dimensional model of vendor, category, and time used to organize.
• What Is a Statement of Work? DefinitionA statement of work sets a contract's scope, deliverables, and price terms. See what it covers and why AP teams check invoices against it for drift.
• What is a subledger?Subledger meaning in accounting: the transaction-level detail behind a general ledger balance, and why it matters for contract audits. Read the full guide.
• What is a surcharge schedule?A surcharge schedule lists the add-on fees a vendor can charge beyond the base rate, each tied to a trigger condition the invoice must satisfy.
• What is a test of design?Test of design checks whether a control, as written, is built to catch a specific error, separate from whether it was actually followed on real invoices.
• What is a utilities and energy audit?Utilities and energy audit definition: reviewing electricity, gas, water, and waste utility billing against tariffs, contracts, and meter data for errors.
• What is a vendor master?Vendor master glossary: what it is, why errors there cause margin drift, and how to audit it. Part of the ValueXPA margin drift library. Read the full guide.
• What is a waste and environmental services audit?A waste and environmental services audit checks vendor invoices for hauling, disposal and compliance fees against contract terms to find margin drift.
• What is an accessorial charge?Glossary definition of accessorial charge: what it is, why it drifts from contract terms, and how AP teams catch it. Part of the ValueXPA margin drift library.
• What is an AP recovery audit?AP recovery audit definition: what it checks, how it differs from ongoing AP controls, what triggers one, and common findings for CFOs. Read the full guide.
• What is an approved vendor list?Approved vendor list definition: the master roster that gates which vendors AP can pay against, and why it alone does not stop margin drift.
• What is an audit trail in AP invoicing?An audit trail is the documented chain connecting a contract term to the invoice line it should have controlled. See what makes one usable in a recovery audit.
• What is an invoice header?Invoice header: the fields at the top of an invoice, vendor, PO, date, contract reference, that identify a transaction before line items are matched.
• What is an invoice line item?Glossary definition of invoice line item: the atomic unit an audit checks against a contract, with common failures and links to related drift types.
• What is an IT and professional services audit?IT and professional services audit: definition, scope, and process for validating vendor invoices against contract terms at $100M+ manufacturers.
• What is an item master?Item master defines the ERP catalog of purchased items and its role in exposing margin drift when rate cards and invoices disagree. Read the full guide.
• What is an MRO and Class C consumables audit?An MRO and Class C consumables audit checks shop supply invoices against contract price lists to find margin drift in high-volume, low-value SKUs.
• What is an NMFC code?Glossary definition of NMFC code covering classification, use in freight audit, and links to margin drift concepts Part of the ValueXPA margin drift library.
• What is capital expenditure in vendor contracts?Capital expenditure is spend that builds or extends a fixed asset. See how capex classification affects contract review and margin drift risk.
• What is contract lifecycle management?Contract lifecycle management defined: what it covers, how it differs from invoice-to-contract matching, and why it does not stop margin drift alone.
• What is contribution margin, and why audit it?Contribution margin is revenue minus variable costs. Learn the formula, how it differs from gross margin, and how vendor invoice errors erode it unseen.
• What is cost of goods sold?Glossary definition of cost of goods sold, its components, and why service vendor invoices inside it are rarely audited. Not every one does.
• What is days payable outstanding?Glossary definition of days payable outstanding (DPO), what it measures, how it relates to margin drift, and its limits as a metric. Read the full guide.
• What is demurrage?Demurrage in freight and logistics billing: definition, how it drifts from contract terms, and how to audit it against carrier agreements. Read the full guide.
• What is drayage?Drayage is the short-haul move of a container between a port or rail terminal and a nearby facility, billed and contracted separately from linehaul freight.
• What is enterprise resource planning?Enterprise resource planning is the software system a manufacturer runs finance, inventory and purchasing on. Definition, scope and audit relevance.
• What is exception reporting in vendor contract audits?Exception reporting flags invoices or transactions that fail a configured rule. It differs from margin drift detection, which finds what no rule was ever.
• What is full truckload (FTL) shipping?Glossary definition of full truckload (FTL) shipping and how it appears on service vendor freight invoices, with links to related audit and drift terms.
• What is indirect spend?Indirect spend covers freight, contract labor, maintenance, IT services and MRO: purchases not tied to a unit of production, and where margin drift often hides.
• What is internal control over financial reporting?Internal control over financial reporting (ICFR) explained: what it covers, who owns it, and how vendor invoice controls fit inside it. Read the full guide.
• What is less-than-truckload (LTL) shipping?Glossary definition of less-than-truckload (LTL) shipping and how it factors into freight audits and margin drift. Part of the ValueXPA margin drift library.
• What is master data?Master data is the standing vendor, item, and contract information systems match invoices against. Wrong entries let drifted charges pass every check.
• What is optical character recognition capture?Optical character recognition capture converts scanned or PDF invoices into structured, machine-readable data. Learn what it does, its limits, and its role in.
• What is period close?Glossary definition of period close, the accounting cycle in which service invoices post against contract terms before the books lock for the month.
• What is procure-to-pay?Procure-to-pay is the full cycle from purchase request through invoice payment, and where its matching controls stop checking against contract terms.
• What is the cash conversion cycle for AP teams?Cash conversion cycle measures days cash stays tied up in operations. Learn the formula, why it matters, and its blind spot on invoice accuracy.
• What is total cost of ownership?Total cost of ownership is the full cost of a service vendor contract over its term, including fees, tiers, and drift beyond the quoted unit price.
• What is workflow routing in a service contract?Workflow routing moves an invoice through approval steps by amount, vendor, or category. It checks sign-off, not contract terms, which is why drift survives.
• Working capital: cash tied up while invoices sit unpaidWorking capital is current assets minus current liabilities. See how vendor billing errors quietly reduce it and how to recover the cash. Read the full guide.
• Zone skipping: how shippers bypass the local carrierZone skipping cuts freight cost by shortening billed zone distance, but the invoice line has to match the injection agreement or the saving quietly disappears.