Duplicate invoice payments are embarrassingly common — and recovering overpayments from suppliers is awkward and time-consuming. Here's how to stop duplicates before they become double payments.
Effective duplicate detection goes beyond identical files. InboxBill checks: same invoice number from the same supplier (regardless of email source), same amount to the same supplier within a configurable window (useful when invoice numbers change), and same PDF content hash (catches reformatted files).
Review both versions
Sometimes what looks like a duplicate is a corrected invoice or a credit note. Compare the two before dismissing either.
Mark as duplicate
Flag the second occurrence as a duplicate. It's archived for reference but not synced to FreeAgent.
Notify the sender if needed
If a supplier is repeatedly sending duplicates, a short note resolves it and prevents future confusion.
InboxBill flags potential duplicates automatically for your review.
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