Payment integrity
Duplicate, split, and round-trip payment testing
Sampling for duplicate invoices, split approvals that dodge thresholds, and payments that leave the company and return under another reference.
Duplicates the application already ‘knows’
Most invoice applications claim duplicate detection. Many detect only an exact vendor-plus-invoice-number match. We look at the same amount on consecutive days, slightly altered invoice numbers, PDF re-scans, and invoices entered against a second vendor master for the same supplier.
Where the application parks a suspected duplicate, we test who can release it and whether that release is visible later.
Splits and round-trips
Approval limits invite splitting. We look for related invoices from one supplier in a short window that together exceed a threshold. Round-trip testing is narrower and only included when payment-file access is granted: we are looking for money that leaves and returns with a different narrative, not for a general fraud investigation.