vendor deduplication

Duplicate Payment Detection: The Patterns That Slip Past 3-Way Match

A 3-way match catches the obvious duplicates — same invoice number, same amount, same vendor. It doesn't catch duplicates with transposed digits, invoices re-submitted from the same vendor under different numbers, or the same line item billed on two POs. Detecting the sneakier patterns takes fuzzy matching, vendor deduplication, and rules that look beyond single-invoice comparisons.