Tool Gate · How it works
How the Invoice 3-Way Match gate works
How the Invoice 3-Way Match gate grades an invoice line against its PO and receipt: seven fixed checks rolled up to the worst, and a payment-block gate where billing more than was received forces BLOCK PAYMENT — which is how a 6-of-7, 86%-match invoice still doesn't get paid, because you don't pay for goods you didn't receive.
How the gate works
This tool grades an invoice line against its purchase order and receipt. It reads 7 checks and rolls them into one verdict — the worst, never the average — and then a gate that can only make it worse.
The 7 checks
| Check | Verdict |
|---|---|
| PO present | MATCH |
| Receipt present | MATCH |
| Qty not over receivedblock · fix first | OVER-BILLEDinv 200 · recv 150 |
| Qty not over PO | MATCH |
| Price within tolerance | MATCH |
| Price matches PO | MATCH |
| Extension ties | MATCH |
The verdict bands
A block-severity check failure — a missing PO, no receipt, or goods billed over what was received — forces BLOCK PAYMENT regardless of the match %. You don't pay for goods you didn't receive or didn't authorize.
In the worked sample it reads BLOCK PAYMENT — Six of seven checks pass — an 86% match. But INV-5003 bills 200 label rolls against a 150-unit receipt, and 'quantity not over received' is a payment-blocking check. So it's BLOCK PAYMENT regardless of the 86%: you don't pay for goods you didn't receive. The one thing to fix first: Qty not over received — INV-5003 bills 200 units against a 150-unit receipt. Bill only the 150 received and the line clears..
Common questions
Can every check look survivable on the How the Invoice 3-Way Match gate works and the company still read BLOCK PAYMENT?
Yes. The roll-up takes the worst of 7 checks — never the average — then a worsen-only gate, the Payment-block gate, escalates when trouble clusters. In the worked sample it reads BLOCK PAYMENT because six of seven checks pass — an 86% match. But INV-5003 bills 200 label rolls against a 150-unit receipt, and 'quantity not over received' is a payment-blocking check. So it's BLOCK PAYMENT regardless of the 86%: you don't pay for goods you didn't receive.
What is a worsen-only gate?
A dispositive rule that can only lower a verdict, never raise it. One fatal flaw overrides an otherwise-set of survivable lines, because a single disqualifying gap shouldn't hide behind an average of the healthy ones. The tool also names the one thing to fix first — here, "Qty not over received — INV-5003 bills 200 units against a 150-unit receipt. Bill only the 150 received and the line clears.".
Every check is a fixed comparison across your own PO, invoice, and receipt — no model, no guess. The workbook and Python engine produce these exact verdicts.
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<iframe src="https://redhub.ai/visuals/tool/invoice-po-receipt-3-way-match.html" title="How the Invoice 3-Way Match gate works — RedHub AI" width="760" height="1682" loading="lazy" style="border:0;width:100%;max-width:760px"></iframe>
<p style="font:14px/1.5 system-ui,sans-serif"><a href="https://redhub.ai/visuals/tool/invoice-po-receipt-3-way-match">How the Invoice 3-Way Match gate works</a> — by <a href="https://redhub.ai">RedHub AI</a>, the AI that tells you when to doubt it.</p>Image + link — a static picture for any blog
<a href="https://redhub.ai/visuals/tool/invoice-po-receipt-3-way-match"><img src="https://redhub.ai/visuals/tool/invoice-po-receipt-3-way-match-share.png" alt="Diagram of the Invoice 3-Way Match gate: seven checks rolled up to the worst, a payment-block gate, and an 86%-match invoice forced to BLOCK PAYMENT for billing 200 units against a 150-unit receipt." width="760" loading="lazy" style="max-width:100%;height:auto;border-radius:16px"></a>
<p style="font:14px/1.5 system-ui,sans-serif"><a href="https://redhub.ai">RedHub AI</a> — the AI that tells you when to doubt it.</p>
This is how Invoice / PO / Receipt 3-Way Match works. More diagrams in the Visual Field Guide.