---
title: "3-way matching"
description: "Three-way matching is the automated check that a supplier invoice agrees with the purchase order and the delivery note before it is paid: same items, quantities"
canonical: https://aikkvnak.hu/en/glossary/three-way-matching
language: en
publisher: AI KKV-nak
updated: 2026-09-19
---

# What is 3-way matching?

Three-way matching is the automated check that a supplier invoice agrees with the purchase order and the delivery note before it is paid: same items, quantities and prices. AI extends it with fraud rules, such as flagging an invoice whose bank account differs from the supplier's known account, and duplicate detection so nothing is paid twice.

## Where it sits in the invoice flow

After AI extraction and before posting to Billingo, Számlázz.hu or the ERP. In Hungary a NAV Online Számla cross-check can run in the same step, verifying the invoice against the data the issuer reported to the tax authority.

## FAQ

**What happens when the match fails?**

The invoice is held, the finance owner gets a one-line alert with the discrepancy, and approves or rejects with one click.

Related: https://aikkvnak.hu/en/glossary/intelligent-document-processing, https://aikkvnak.hu/en/glossary/nav-online-szamla, https://aikkvnak.hu/en/glossary/human-in-the-loop