Key takeaways
- The three documents are what you ordered (purchase order), what arrived (receiving record or delivery slip) and what you’re billed for (invoice).
- A two-way match compares only the PO and invoice; it can’t tell you whether the goods actually arrived.
- Three-way matching catches overbilling, short deliveries, duplicate invoices and fake invoices.
- Small businesses can run a light version by checking the invoice against the order and the delivery slip or receipt.
What is a three-way match?
Before you pay a bill, you want to know three things: did we order this, did we get it, and are we being charged the right amount? A three-way match answers all three by lining up one document for each question. It’s a standard control in accounts payable, but the idea is simple enough for any business that buys on credit.
Keep receipts and invoices ready for matching with the Manage Receipt app.
What you ordered: items, quantities, agreed prices. Created by you.
What arrived: a packing slip, delivery note or goods receipt signed on delivery.
What you’re asked to pay: items, quantities, prices and total from the vendor.
How a three-way match works
- OrderIssue a purchase order with a PO number.
- ReceiveCount the delivery and record what actually arrived.
- Get the invoiceThe vendor bills you, quoting the PO number.
- CompareCheck items, quantities, unit prices and totals across all three.
- Approve or holdPay if they agree; contact the vendor if they don’t.
A café orders 20 cases of cups at $18 each on a PO, total $360. The delivery slip shows 18 cases arrived. The invoice bills 20 cases at $19, total $380. The match fails twice: quantity (18 received vs 20 billed) and price ($19 vs $18 agreed). The café should pay for what arrived at the agreed price: 18 × $18 = $324, and ask the vendor for a corrected invoice.
Many businesses allow a small tolerance, such as a few dollars or a small percentage, so minor rounding or shipping differences don’t hold up payment. Anything above it gets a closer look.
Two-way vs three-way match
| Two-way match | Three-way match | |
|---|---|---|
| Documents | PO and invoice | PO, receiving record and invoice |
| Confirms price and quantity ordered | Yes | Yes |
| Confirms goods arrived | No | Yes |
| Effort | Low | Medium |
| Best for | Services, subscriptions, low-risk bills | Physical goods, large or repeat orders |
Some larger companies add a fourth document, an inspection report, for a four-way match. Most small businesses never need that.
Benefits of three-way matching
- You stop paying for goods that never arrived or arrived short.
- Price increases that weren’t agreed get caught before payment.
- The same invoice can’t be paid twice without someone noticing.
- Fake invoices from vendors you never ordered from have no PO to match, which helps prevent expense fraud.
- You end up with a complete, organized record for each purchase.
For a small business without formal POs, a practical version is to match the invoice against your order confirmation email and the delivery slip or store receipt. It’s the same check with lighter paperwork.
Your receipt as the third document
When you pay at the counter or online, the receipt is your proof of what you got and what you paid. Scan it into Manage Receipt and the vendor, date, line items and total are extracted, so you can compare them with your order and the vendor’s invoice in seconds and keep all three on record.
Explore AI Receipt ScannerFrequently asked questions
What is two-way vs three-way match?
A two-way match compares the purchase order with the invoice to confirm prices and quantities. A three-way match adds the receiving record, so you also confirm the goods actually arrived. Two-way suits services and low-risk bills; three-way suits physical goods and larger orders.
What happens if a three-way match fails?
You hold the payment and find out why. Common causes are a partial delivery, a price change or a billing error. Contact the vendor, agree on the right amount, and get a corrected invoice or credit note before paying. Record the outcome with the documents.
Do small businesses need three-way matching?
Not formally, but the check is worth doing for larger supplier orders. Before paying, compare the invoice with your order and what actually arrived. It takes a few minutes and catches short deliveries, price creep and duplicate bills that would otherwise slip through.
Can a receipt be used in a three-way match?
Yes. When you buy and receive goods at once, such as at a supply store, the receipt confirms what you got and paid. For deliveries, the packing slip shows what arrived, and the vendor’s receipt or paid invoice confirms the payment.