Three-way match
A three-way match is a payment control. Before you pay a supplier invoice, you compare it with two other documents: the purchase order and the record showing the goods or services arrived.
If all three agree on what was ordered, what was received and what was charged, the invoice can be approved.
Why a three-way match matters in a cost review
Paying an invoice is the last step in a chain. The match tests that chain. The purchase order says what you agreed to buy and at what price. The receiving record says what actually showed up. The invoice says what the supplier wants to be paid.
When a reviewer looks at your payments, the match is one of the first controls examined. A strong process catches errors before money leaves. A weak or skipped one lets mistakes through, which can later appear as a duplicate payment or an overcharge.
A plain-words illustration
Imagine you order a set of items for your warehouse. The purchase order lists the item, the quantity and the price. When the delivery arrives, a team member records what was in the box. Later an invoice arrives.
Someone compares the three. The invoice charges for more units than you received, and at a higher price than the order. The match flags it, the invoice is held and the supplier is asked to correct it. Without the check, the invoice would have been paid as presented.
How it shows up in a review
In an accounts payable audit, a partner firm may ask how invoices are approved and whether a match is required. It may then test whether the process worked in practice. [CONFIRM: a partner firm supplies and approves this statement]
Typical points of mismatch include:
- The invoiced price differs from the price on the order.
- The billed quantity differs from the quantity ordered or received.
- The description on the invoice differs from the order.
- No receiving record exists, so delivery cannot be confirmed.
- There is no purchase order at all.
Many organizations allow small differences within set tolerances. A reviewer will ask what those tolerances are and who can override them. Services, such as maintenance or labor, often lack a physical receipt, so another form of confirmation is used. A match also has limits. It confirms that documents agree with each other, but if all three share the same mistake, the check can still pass. That is one reason a recovery audit looks at past payments even where a match is in place.
Related prevention topics appear in supplier contract compliance, where billed terms are compared with contract terms.
Common mistakes
- Skipping the match for convenience. Urgent or repeat invoices get paid without checks.
- Setting loose tolerances. Small differences can add up across many invoices.
- Allowing too many overrides. Document who may approve an exception and why.
- Not recording receipts. Without a receiving record, the match cannot work.
- Ignoring service spend. Services need a defined way to confirm delivery.
- Assuming the match tests the contract. It tests documents against each other, and the purchase order may not reflect the contract. Add a separate check against the agreed terms. See contract compliance analysis.
- Letting one person do everything. Separate ordering, receiving and paying where you can.
Tip: Keep a short written policy that says which invoices need a match, what tolerances apply and who approves exceptions.
Related terms and pages
- Duplicate payment is an error the match helps prevent.
- Recovery audit reviews payments made in the past.
- Contract compliance analysis tests billing against the agreement.
- Accounts payable audit is the matching service category.
- The glossary lists more terms.
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Sources
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