Credit Note Explained: When to Issue One and What It Must Include

You sent an invoice, and then something changed: the customer returned two items, you charged the wrong price, or you agreed a discount after the fact. You can't simply edit or delete the invoice. It's already in your records, and possibly in the customer's and the tax authority's. The correct tool is a credit note.

What a credit note is#

A credit note is a document a seller issues to reduce or cancel an amount on an invoice already sent. It's effectively a negative invoice, and it always refers to the original.

It keeps your records honest. Anyone reading your books later can see the original invoice, the correction, and why it was made.

When to issue one#

• Returns: the customer sends back some or all of the goods.
• Pricing errors: you charged the wrong unit price or quantity.
• Damaged or short deliveries: fewer items arrived than invoiced, or some were faulty.
• Discounts agreed after invoicing, for example a goodwill discount after a late delivery.
• Cancelled orders that were already invoiced.
• Duplicate invoices: the same sale was invoiced twice.

What to include#

1. The title "Credit Note".
2. A credit note number from its own sequence (for example CN-2026-0012).
3. The date of issue.
4. Your business details and the customer's, matching the original invoice.
5. The original invoice number and date.
6. The items and amounts being credited, with quantities and unit prices.
7. The tax being credited, if the invoice included VAT.
8. The total credit.
9. The reason, briefly: "2 chairs returned, damaged in transit".
10. What happens next: refund, or credit held on account.

A worked example#

An office supplier invoices a client for 20 chairs at RWF 120,000 each plus 18% VAT: INV-2026-0187, total RWF 2,832,000. Two chairs arrive damaged and are returned. The supplier issues:

If the client hasn't paid yet, they now owe RWF 2,548,800. If they already paid in full, the supplier refunds RWF 283,200 or, if the client agrees, keeps it as credit against the next order.

Credit note vs refund vs debit note#

A buyer who received faulty goods might send a debit note asking for a credit; the seller answers with a credit note. If the original invoice was too low, the seller issues an additional invoice or a debit note for the difference.

VAT and tax#

If you're VAT-registered, the credit note reduces the output VAT you declared on the original invoice, and the customer reduces the input VAT they claimed. Include the VAT amount clearly so both sides can adjust their returns. Tax authorities set specific rules on how and when this is done. In Rwanda, check the Rwanda Revenue Authority guidance on electronic billing and credit notes; elsewhere, your tax office publishes equivalent rules. Our article on VAT invoices in Rwanda covers the invoice side.

How it affects your books#

In your accounts, a credit note reduces revenue (and VAT payable) for the period in which it's issued, and reduces the customer's balance. If you refund money, that's recorded as a payment out. Your profit and loss statement then reflects the sale you actually made, not the one you first invoiced. See our guide to the profit and loss statement.

Good practice#

• Never delete a sent invoice. Correct it with a credit note.
• Credit the exact lines affected, not a vague lump sum.
• Issue it promptly, so the customer's records and yours agree.
• Send it the same way you sent the invoice, and keep a copy with the original.
• Cancel and reissue when an invoice is badly wrong: a full credit note cancels it, then a fresh, correct invoice replaces it.

Partial vs full credit notes#

A partial credit note covers only some lines or part of the value, such as two returned chairs out of twenty. The original invoice stays valid for the rest. A full credit note cancels the whole invoice. Use it when the entire sale falls through or the invoice was issued to the wrong customer. In both cases, the original invoice number stays in your records and never gets reused.

Store credit#

For shops, a credit note can also work as store credit: the customer returns an item and receives a credit to spend later instead of cash. State the value, the expiry date if any, and how it can be used. Record it so it's honoured whoever is at the till.

Telling the customer#

A credit note that arrives without explanation causes more questions than it answers. Send it with a short, plain message: what it cancels, why, and what happens next. For example: "Attached is credit note CN-2026-0012, which cancels RWF 45,000 of invoice INV-2026-0187 for the two damaged chairs. The balance now due is RWF 135,000." If the customer has already paid, say whether you will refund the amount or keep it as credit, and when.

Ask the customer to confirm they received it, especially with larger businesses. Their accounts team has to match your credit note to their records, and a quick confirmation saves a round of emails at month end.

Creating a credit note#

Use the same tool you use for invoices so numbering, customer details and tax settings match. In the Tekservix invoice generator, set the document title to "Credit Note", use a CN- prefix, reference the original invoice in the notes, and enter the credited items. For the full sequence of sales documents, from quote to receipt, see quote vs invoice and invoice vs receipt.