What it means
When a customer pays a supplier, the money arrives as a single sum. If the customer is paying several invoices, taking a discount, or deducting a credit note, the supplier cannot tell from the bank statement alone which bills have been settled.
A remittance letter, also called a remittance advice, solves this by setting out the details. A typical letter includes the payer's name, the date, the payment method, a list of invoice numbers with amounts, any credit notes or discounts applied, and the total sent.
It may also include a reference number that appears on the bank transfer or cheque. Today the letter is often an email or an automatically generated PDF, but the content is the same.
The letter matters because it drives accurate bookkeeping. The receiving accounts team uses it to apply the payment to the correct invoices in the sales ledger (the record of what customers owe), which keeps customer balances correct.
If the payer short-pays an invoice, the letter explains why, such as a disputed charge or an early payment discount, so that the supplier can follow up with the right information. For the paying business, sending a clear remittance letter reduces calls from suppliers chasing for money that has actually been paid.
It also creates a record that can be used in a dispute. Accounts payable teams commonly send them automatically each time a payment run is completed.
The common problem is unapplied cash, which is money received that cannot be matched to an invoice. A missing or vague remittance letter is a leading cause of it, and it can leave a customer account showing as overdue when it has paid.
Good remittance practice is a small piece of administration that saves a surprising amount of time.
In practice
Real-world examples.
Example
A building supplies wholesaler receives a bank transfer of $18,130 from a contractor. The remittance letter, sent by email the same day, lists two invoices, one credit note and a 2% discount, so the accounts clerk applies the payment in minutes. The contractor's account shows zero owing the same afternoon.
Example
A small design agency is paid by a large corporate client that handles hundreds of suppliers. The client's payment system generates a remittance advice that lists the agency's invoice number and a payment reference. Without it the agency would have to search through its ledger to guess what the payment covered.
Example
A food distributor short-pays an invoice by $800 because of damaged goods. The remittance letter explains the deduction and refers to the damage report. The supplier's credit controller checks the claim and issues a credit note for the same amount, closing the matter without a dispute.
Formula
Calculation
Payment amount = Total invoices - Credit notes - Early payment discount
Suppose a customer pays two invoices of $12,000 and $8,000, and also has a credit note of $1,500 for returned goods. Invoices less credit note = 12,000 + 8,000 - 1,500 = $18,500. The customer takes a 2% early payment discount on that amount, which is 18,500 x 0.02 = $370. The payment amount stated in the remittance letter is 18,500 - 370 = $18,130.Case study
Seen in the real world.
Greenfield Packaging is an illustrative, fictional supplier with 300 business customers. Its credit control team was spending about 20 hours a week chasing customers for invoices that had actually been paid, because many payments arrived without any detail.
The finance manager asked the largest 50 customers to send remittance advices by email, and added a request to the payment terms on every invoice. She also set up a mailbox that automatically scanned incoming advices and suggested invoice matches.
Within three months, unapplied cash fell from $240,000 to $60,000, and the credit control team's chasing time dropped by more than half. The illustrative lesson was that a simple document, sent consistently, can remove a surprising amount of waste.
Watch out
Common mistakes.
- Sending a payment with no remittance information, leaving the supplier to guess which invoices have been paid.
- Using vague references such as the word payment, instead of invoice numbers that can be matched in the ledger.
- Failing to explain deductions, such as discounts or disputed amounts, which triggers unnecessary chasing and arguments.
Questions
People also ask.
Is a remittance letter the same as a receipt?
No, a remittance letter is sent by the payer to explain what a payment covers, while a receipt is issued by the receiver to confirm money has arrived.
When should I send one?
Send it on or just before the day the payment is made, so that the supplier has the information when the money lands in their bank.
Is a remittance letter legally required?
Usually not, but it is standard commercial practice, and some large buyers and suppliers make it part of their contract terms.
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