Risk
What is a duplicate invoice detector?
A duplicate invoice detector identifies invoices that match previously processed records based on a combination of identifiers: invoice number, supplier VAT number, amount, date, and line item fingerprint. Detection prevents double payment in accounts payable workflows and flags potential fraud or processing errors before they reach the ledger.
Capabilities
- Exact Match Detection
- Flags invoices with identical invoice numbers from the same supplier.
- Fuzzy Match Detection
- Identifies near-duplicate invoices with slight variations in amount, date, or number format that suggest re-submission of previously paid invoices.
- Cross-Period Detection
- Searches across configurable historical windows (30 days, 90 days, rolling 12 months) to catch delayed duplicate submissions.
- Audit Trail Entry
- Every duplicate flag generates an immutable audit trail entry recording the matched pair and the detection rationale.
Frequently Asked Questions
- What is the most common cause of duplicate invoices?
- The most common causes are supplier re-submission after a payment delay, multiple processing pathways for the same invoice (email and EDI), and erroneous re-keying in manual processing workflows.
- What is an acceptable duplicate invoice rate?
- A duplicate invoice rate below 0.1% of invoice volume is considered best practice in automated AP workflows. Rates above 0.5% indicate a systemic processing issue. Manual processing environments often see rates of 1-3%.