Payables accounts matching transactions
All of the transactions on an open item creditor/payables account are held until they are cleared by a payment or a credit note. When you use the automatic payment facility, Payment Run (PYR) to generate payments, the payment transactions are matched to the corresponding invoice transactions automatically.
If you make a manual payment and enter the payment details using Ledger Entry, you can match the payment to the corresponding invoices when you post the payment, using the Ledger Entry online allocation feature. Otherwise, you can allocate the payment as soon as possible after posting, using either Transaction Matching (TRM) or Account Allocations (ACA).