What Is a Remittance Advice? Meaning and Example

Why suppliers need a remittance advice

Suppliers often get one payment that covers several invoices. A customer with six open bills might pay four of them in one transfer, hold back one it disputes and subtract a credit for returned parts. The supplier's bank statement shows a single number.

Matching that number to open invoices in accounts receivable, the list of money customers owe the business, is called cash application. The remittance advice exists for that job. X12, the standards body for business-to-business electronic documents, describes its 820 remittance advice the same way: the detail a supplier needs to apply a payment to its accounts receivable.

When the advice is missing, the money sits in the supplier's books as unapplied cash, money received but not yet matched to any invoice. The invoices you paid still look overdue, so you get reminder emails, a call from their collections clerk, and sometimes a credit hold, where the supplier stops letting you buy on account.

What a remittance advice should include

A useful remittance advice answers every question the supplier's bookkeeper would otherwise have to call about:

• Your business name and the customer or account number the supplier uses for you
• The payment date, method and reference, such as a check number or an ACH trace number, the ID the bank gives a transfer
• The total amount paid
• Each invoice number, with its date and original amount
• The amount applied to each invoice
• Any discount, credit or short payment, with a one-line reason
• A name and email for questions

Use the supplier's invoice number, not your own purchase order (PO) number. A PO number is your internal reference for what you ordered, and the supplier's system is organized by its own invoice numbers. If a supplier asks for both, give both.

How a remittance advice is sent

The oldest form is the check stub: a voucher check has a detachable section listing the invoices being paid.

Many payers now send the remittance advice by email, often as a PDF from their accounting or bill pay software on the day of payment. Some large payers use a supplier portal instead. Pennsylvania's state government is a good public example: its vendor payment page offers remittance emails sent on or before the payment date, an option to put the vendor's invoice number in the ACH payment record, and a lookup tool showing the last 60 days of payments.

That middle option rides inside the payment itself. ACH, the US network for bank-to-bank transfers, lets business payments carry addenda records, extra lines of payment detail. Under the ACH file formats published by Nacha, the organization that writes the ACH network's rules, a CCD payment, the basic business-to-business format, can carry one addenda record of 80 characters, enough for an invoice number or two. A CTX payment, common between companies that exchange electronic documents regularly, supports up to 9,999 of them, enough to carry a full X12 820 remittance advice.

Nacha notes that this detail may or may not be shown to the recipient, depending on their bank. Send the email as well.

Worked example: one payment, three invoices and a credit

An HVAC contractor in Ohio pays its supply house on October 15, 2026. It has three open invoices and one credit memo, a document from the supplier that reduces what the contractor owes, in this case for returned fittings. Invoice 50211 has terms of 1/10 net 30, meaning 1% off if paid within 10 days of the invoice date and the full amount due in 30. Two dampers on invoice 50302 never arrived.

The arithmetic: $3,450.00 + $1,275.50 + $980.00 - $212.40 = $5,493.10 billed. Take off the $34.50 discount and the $120.00 short payment and you get $5,338.60. The discount is valid because October 15 is nine days after the October 6 invoice date.

The supply house sees one ACH deposit of $5,338.60, an amount that matches no invoice. With the remittance advice, its bookkeeper closes 50211 and records the $34.50 as a discount given, closes 50288, applies the credit memo, and posts $860.00 to 50302. The last $120.00 stays open and flagged as disputed until the dampers arrive or the invoice is corrected.

The contractor should keep that $120.00 open in its own accounts payable (the bills a business owes) as well. Otherwise, when the dampers show up three weeks later, nobody remembers that money is still owed.

Remittance advice vs remittance slip, invoice and receipt

A remittance slip is the tear-off part of a bill, like the bottom of a utility bill that says "Return this portion with your payment." The seller prints it and you mail it back with your check. A remittance advice does the same job, but the payer writes it, and it can cover many invoices at once.

Common remittance advice mistakes

The most common mistake is sending nothing. One payment for one invoice can get by with the invoice number in the payment memo. Once a payment covers several invoices, a credit or a deduction, the supplier needs a full advice.

A deduction with no reason looks like a late payment, and the supplier's collections team chases it. Advices sent to a sales rep sit in the wrong inbox, so ask for the supplier's accounts receivable email when you set them up as a vendor.

Fake remittance advice is a fraud problem too. Phishing emails use "remittance" in the subject to get a click from busy AP and AR staff. The University of Pittsburgh's IT team warned about one titled "Purchase Ledger Remittance" with an attachment that tried to install malware. If you weren't expecting a payment from the sender, don't open the attachment. Check with the customer using a phone number or email you already have.

How AP teams handle remittance advice

On the payer's side, the remittance advice comes out of the payment run, the batch of bills AP pays on a given day. If each bill was entered with the supplier's invoice number, the advice is simply the list of bills in that payment, with any adjustments. Our guide to the accounts payable process lays out the steps from invoice to payment.

A wire usually needs the advice sent as a separate email. Our comparison of ACH, wire and check payments covers the cost and speed of each.

Clyr's bill pay and accounts payable tools handle the steps before the remittance advice goes out. Vendors email invoices straight into Clyr, line items are extracted automatically, approvals route by your rules, and you pay by ACH or check. Vendors also enter their own ACH or check details through a link, so payment details come from the vendor rather than from someone retyping an email.

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