Because the credit note arrives separately from the bill it relates to. It gets filed, the next payment run pays the full amount, and the credit quietly expires unclaimed.
A vendor credit is money a supplier owes you — a return, an overcharge, a rebate — recorded against the vendor and available to offset what you owe.
The credit is recorded against the vendor and, where relevant, the original bill. Payment runs offset available credits automatically, so it is used before cash goes out.
Goods are returned against a purchase order. The credit references the return, reduces the payable, and the next run pays the net figure rather than the full bill.
It will not chase a credit you are owed but have not received. Until there is a document, there is nothing to record.
It reduces the payables balance and the aging view, adjusts the cash flow commitment, and reverses stock where the credit relates to returned goods.
Yes, if the supplier pays it back — recorded as a receipt.
In the payment run, yes, unless you exclude them.
Yes. It stays available against the vendor until it is used.
Fourteen days, every module, no card. Or half an hour with someone who will run it on your own records and tell you where it does not help.