The document that customer returns with their payment which identifies the source and the amount of payment is called a remittance advice.
A remittance advice letter is one sent by a customer to a supplier informing them that their invoice has been paid. When a customer pays by check, the remittance advice is frequently included. Remittance advices are not required, but they are considered a courtesy because they assist the accounts-receivable department in matching invoices with payments. As a result, the remittance advice should include the invoice numbers for which payment is being made.
Furthermore, remittance slips require little effort to create because many businesses will issue a remittance advice note alongside the invoice, making it easier for customers to send the required information in the correct format.
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