If a retailer has overpaid a supplier, the supplier can send a credit note to the retailer. A credit note is a document sent by a supplier to its customer, notifying them that a credit has been made to their account for goods returned or services not rendered . This could be due to an overpayment, or it could be used to adjust the amount due on an invoice without having to issue a new one1. The credit note will detail the amount of the overpayment and can be used to offset future payments or can be refunded as agreed upon. It’s important to note that the exact process may vary depending on the company’s policies and the terms of their agreement with the supplier.