What is a credit note and when do I need one?

A credit note is the document that corrects or reverses an issued invoice: wrong amount, agreed discount, returned goods, cancelled work. It carries its own number, negative or reversing amounts, a reference to the original invoice with its date, and the reason for the correction. You need one whenever an issued invoice must change, because issued invoices are never edited or deleted.

Billingz Guides · Invoicing

Credit notes explained: how to correct an invoice properly

Short answer

An issued invoice is never edited and never deleted. When something was wrong, or the deal changed, you issue a credit note: a document with its own number that reverses the original, names it, and states the reason. Done right, both sets of books stay clean and the story of the correction is readable years later.

What a proper credit note carries

Its own number - it joins your document sequence, in some countries in a dedicated series.
A reference to the original - invoice number and date, so the two documents lock together.
The reason - agreed reduction, return, cancellation. Several countries expect it stated, all auditors appreciate it.
Reversing amounts - line for line, with VAT reversed at the original rates, and a clearly labelled amount to be refunded.

What it must not carry

A credit note returns money. So: no due date, no late-payment clause, no payment QR, no pay-by-card button. Every one of those elements asks the client to pay, and on a correction document they range from confusing to embarrassing. Bank details may remain as a reference for the refund itself.

The names differ, the mechanics do not

Rechnungskorrektur in Germany and Austria (Gutschrift means self-billing there, a different thing entirely).
Avoir in France; factura rectificativa in Spain, in its own R-series; nota de credito with its own NC series in Portugal.
Opravny danovy doklad in Czechia (the legal term since 2013; dobropis survives only colloquially), while Slovakia kept dobropis.
Knizno odobrenie and its variants across the Balkans; kreditna faktura in the Nordics; corrective invoice (faktura korygujaca) in Poland, with a stated correction reason.

The label follows the country; the anatomy stays the same. What changes per country is the numbering rule and, in clearance systems like Italy or Serbia, the fact that the credit note also travels through the government channel like any other invoice.

The habit that keeps books clean

Correct fast, correct visibly, and never negotiate a correction outside the record. A credit note issued the day the client raises the problem reads as professionalism; a quietly re-sent “fixed” PDF with the same number reads as a mess, and in most of Europe it is one. The sequence of documents is the story of your business; corrections belong in the story.

Common questions

Can I just delete or edit an invoice I already sent?

No. An issued invoice is part of a sequential record on both sides. Deleting it breaks your numbering and your client's books. The correction instrument is a credit note that reverses the original, followed by a new invoice if the deal still stands on different terms.

Does a credit note need its own number?

Yes. It is a document in its own right and joins your sequence, sometimes in its own series: Spain requires a separate series for corrective invoices, Portugal issues them as an NC document type, and Bulgaria continues the same ten-digit sequence. What it must always carry is a reference to the invoice it corrects.

Why does my German accountant object to the word Gutschrift?

Because in German VAT law a Gutschrift is a self-billing invoice issued by the buyer, not a correction. Since 2013 the safe title for a correction is Rechnungskorrektur or Stornorechnung. Using Gutschrift for a correction can create tax liability confusion, which is why careful software avoids it.

Should a credit note show a due date or payment details?

No due date and no payment prompts: a credit note gives money back, it does not ask for any. Bank details may stay as a reference, but a payment QR or a pay-online button on a credit note is a sign the document was generated carelessly.

Built for this

Billingz produces credit notes the way each country expects: own number, the reference and reason, reversed amounts, and none of the payment elements that do not belong on one.

See how Billingz handles corrections

This guide is general information, not tax advice. Country practices are compiled from national VAT laws and tax-authority guidance, as verified in August 2026. Rules and document names vary by country and change over time; Billingz does not warrant that this page reflects the rules on the day you read it. Confirm specifics with a qualified accountant.