Between 5 and 10 percent of vendor invoices contain errors. Some are vendor mistakes — wrong price, wrong quantity, math error on the total. Some are internal documentation gaps — the goods receipt was not recorded when the delivery arrived, so the PO is still showing as open. Some are intentional — duplicate invoices submitted hoping the AP team will not catch the resubmission. AI-based invoice verification catches all three categories before a check or wire transfer leaves the company.
Price Discrepancy Detection
The most common invoice error is a price that does not match the PO. The vendor invoices at list price when the PO reflects a negotiated discount. Or the vendor applies a price increase that was not agreed to in the current PO. The AI matches invoice line item prices against PO unit prices and flags any variance above the tolerance threshold — presenting the PO price, the invoice price, and the dollar impact of the discrepancy.
Duplicate Invoice Detection
Duplicate invoice detection checks the current invoice against the invoice history in the AP system. An invoice with the same vendor ID, same invoice number, same amount, or the same line items and date range as a previously processed invoice is flagged as a potential duplicate. The AP team reviews the duplicate flag and confirms whether the invoice is a legitimate resubmission or a duplicate payment request.
The Accounts Payable 3-Way Match AI Agent runs price discrepancy, quantity mismatch, and duplicate detection simultaneously for every invoice — producing a complete error report before any payment is queued.