The activities associated with reconciling purchase orders, receipts and supplier invoices and approving supplier invoice payment. Reconciliation typically includes verifying delivered volumes, price, application of penalties or discounts and where applicable verification of grade or quality. This may include recording the actual costs (purchase price, transportation costs, testing costs, etc) on the customer order for which the purchase was made. ForS1andSource-to-Ordercontracts the verification typically is a standardized, repeatable process.S3may require more extensive verification. Discrepancies should be resolved before theApprove Paymentprocess is considered completed.