Supplier invoices: the three-way match that stops duplicate payments
Duplicate supplier payments rarely come from fraud. They come from ordinary invoices arriving twice, once by email and once through a portal, or from a credit note that never reached the person approving the payment run. A three-way match is the simplest control that catches both problems before money leaves the bank, and it costs nothing except a few minutes of discipline at the point of entry. The match has three documents: the purchase order, the goods or services receipt, and the supplier invoice. When all three agree on supplier, quantity, price, and description, the invoice is safe to pay. When any one of them disagrees, the invoice waits. That waiting is the point. Most payment errors are not discovered by a year-end audit, they are discovered by a supplier chasing a short payment or by a bank statement that does not reconcile, long after the money has gone. Start with the purchase order A purchase order is only useful if it is raised before the goods arrive, not reconstructed a...