Duplicate invoices that do not look like duplicates
Same claim, different invoice number, slightly altered description — how verification work spots recycled charges.
Classic duplicate detection compares invoice numbers. Sophisticated duplicates avoid that trap.
Patterns we see in Hong Kong trading packs
- A freight surcharge billed once under a logistics invoice and again as a line on a consolidated monthly statement
- Container handling charged by the terminal and re-billed by the forwarder with a new reference
- Credit notes issued but never applied, followed by a “replacement” invoice for the same service month
Practical tests beyond invoice number
During verification we sort high-activity vendors by amount and period, then read descriptions and supporting bill-of-lading numbers. Matching on shipment references often reveals recycled claims faster than matching on invoice IDs.
What to do when you find one
Do not reverse quietly without a vendor conversation trail. Document the two (or more) claims, hold the disputed amount, and ask the vendor to confirm which reference remains payable. Your exception report should preserve that trail for later audit questions.