What Is a Credit Note?

A credit note (also called a credit memo) is a commercial document that a seller issues to a buyer to reduce or cancel the amount owed on an invoice that has already been sent. Where an invoice says "you owe me this", a credit note says "I am giving this amount back". It is, in effect, a negative invoice.

The reason credit notes exist comes down to one principle of accounting and tax law: an issued invoice is a fixed document. Once you have raised invoice number 2026-0145 and sent it, you cannot quietly edit the figures, change the date, or delete it — invoice numbers must run in an unbroken sequence. So when something needs to change after the fact, you do not touch the original; you issue a separate document that corrects it.

That corrective document is the credit note. It carries its own unique number (often in a separate series such as CN-2026-0007), references the original invoice it relates to, and reverses the relevant net amount and VAT. The net effect is that the customer's outstanding balance, your revenue, and the VAT you owe are all reduced by the right amount — without any invoice ever being deleted.

For e-commerce and marketplace sellers, credit notes are routine. Returns on bol.com and Amazon, cancelled Shopify orders, damaged goods, and partial refunds all trigger a credit note. Handling them correctly is part of keeping every accounting document compliant.

When Should You Issue a Credit Note?

A credit note is the right tool whenever an already-issued invoice needs to be reduced or cancelled. The most common situations for online sellers are:

• Product returns: The customer sends goods back and is entitled to a refund of the price and the VAT.
• Overcharges or pricing errors: The invoice showed the wrong price, quantity, or VAT rate, and the customer was billed too much.
• Order cancellations: An order is cancelled after the invoice was raised but before or after payment.
• Damaged or faulty goods: Items arrive broken and you agree a full or partial refund instead of a replacement.
• Post-sale discounts or goodwill gestures: You grant a discount, a volume rebate, or a goodwill credit after the invoice has gone out.

The deciding question is always the same: has the invoice already been issued? If you spot the mistake before sending the invoice, simply correct the draft. Once it has been sent and entered into your accounts, the only compliant route is a credit note.

A credit note can be full (it cancels the entire invoice — for a complete return or a cancelled order) or partial (it reverses only part of the invoice — for one returned item out of three, or a single overcharged line). In both cases the same rules on numbering, referencing, and VAT apply.

Credit Note vs Debit Note: The Difference

Credit notes and debit notes are often confused, but they move money in opposite directions. The simplest way to remember the difference is by who benefits and which way the balance moves.

A credit note is issued by the seller to reduce the amount the buyer owes — it credits the customer's account. You issue one when you have over-invoiced, accepted a return, or granted a discount.

A debit note does the reverse: it increases the amount owed. A debit note is commonly raised by a buyer to formally notify a supplier that they intend to return goods or expect a credit, or by a seller who needs to charge an additional amount — for example, when the original invoice undercharged the customer.

In short: a credit note says "you owe less", a debit note says "you owe more". For most webshop and marketplace sellers, the credit note is by far the more common document, because returns and refunds happen far more often than additional charges. When you do need to charge more, many businesses simply issue a new invoice for the extra amount rather than a debit note.

How a Credit Note Adjusts VAT

Getting the VAT adjustment right is the part of credit notes that causes the most errors. When you originally invoiced the customer, you charged VAT and that VAT became output VAT you owe to the tax authority. A credit note reverses the sale, so it must also reverse the VAT at the same rate that was originally applied.

Imagine you sold an item for €100 plus 21% VAT, giving a €121 invoice. The customer returns it. Your credit note must show −€100 net and −€21 VAT, for a total of −€121 — using exactly the same VAT rate as the original invoice, even if the standard rate has changed since. The credit note then reduces your output VAT for the VAT period in which the credit note is issued, not the period of the original invoice.

Pro Tip: A credit note must mirror the VAT treatment of the original invoice exactly. If the sale was a 0% intra-EU B2B supply with the reverse charge, the credit note is also 0% with reverse-charge wording. Winkel Factuur copies the original invoice's VAT logic onto the credit note automatically, so you never reverse the wrong amount. Start your free trial →

Two timing points matter. The credit note reduces output VAT in the period it is issued, keeping your return accurate without amending a past filing. And for cross-border sales it must use the same VAT country and rate as the original — a sale taxed at the destination rate under the OSS scheme is credited at that same destination rate. Verify the correct treatment with your accountant or tax authority if you are unsure.

Credit Note Example and Mandatory Details

A compliant credit note looks much like an invoice, but with negative (or clearly credited) amounts. A typical credit note example for a returned item would contain:

• The title "Credit Note" (or "Credit Memo") clearly stated, so it is not mistaken for an invoice
• A unique sequential credit note number (e.g. CN-2026-0007), separate from your invoice series
• The credit note date and your full business and VAT details
• The customer's details, matching the original invoice
• A clear reference to the original invoice number and date being corrected
• A reason for the credit (return, cancellation, pricing correction, etc.)
• The net amount, VAT rate, VAT amount, and gross total being credited — shown as negative or labelled as a credit

The single most important field — and the one most often forgotten — is the reference to the original invoice. Without it, neither your accountant nor a tax inspector can trace which sale the credit note corrects, and the document is effectively orphaned in your books.

For a one-off correction, a credit note template with the fields above and negative amounts will do the job. But for any business issuing more than a handful per month — most marketplace sellers — generating credit notes from your invoicing system is far safer, because the numbering, referencing, and VAT reversal are handled automatically.

Common Credit Note Mistakes to Avoid

Credit notes look simple, but a few mistakes recur often enough to cause real bookkeeping and VAT problems:

• Editing or deleting the original invoice instead of issuing a credit note — this breaks your invoice sequence and is non-compliant.
• Forgetting to reference the original invoice number, leaving the credit unmatched and untraceable.
• Reversing the wrong VAT rate — the credit note must use the rate from the original invoice, not today's rate.
• Reusing an invoice number for the credit note; credit notes need their own unique sequential numbers.
• Issuing a credit note as a positive amount, which can be re-read as a second invoice and double-count revenue.
• Crediting the wrong customer or the wrong currency, especially on multi-channel and cross-border orders.

Each of these is exactly the kind of repetitive, rules-based error that automation eliminates. A system that links the credit note to the original invoice, copies the right VAT treatment, and assigns the next credit note number removes almost all of this risk — and keeps your VAT return clean at filing time.

Create Credit Notes Automatically with Winkel Factuur

Issuing correct credit notes by hand across every sales channel is slow and error-prone. Winkel Factuur is built for marketplace and webshop sellers who need every document, including credit notes, to be right the first time:

• One-click credit notes: Turn any invoice into a full or partial credit note that automatically references the original and reverses the correct net amount and VAT.
• Correct VAT and VIES logic: The credit note copies the original invoice's VAT treatment — standard rate, OSS destination rate, or reverse charge — so the adjustment is always accurate.
• Branded multi-marketplace invoices: Compliant invoices and credit notes for bol.com, Amazon, Shopify, and WooCommerce, all in your own branding.
• Profit & VAT dashboard: Refunds and credits flow in so your revenue and VAT figures stay accurate across every channel.
• Review journeys, buy-box & stock alerts: Automated review requests and real-time buy-box and stock monitoring help you sell more while the admin runs itself.
• Accounting integrations: Invoices and credit notes flow straight into Exact Online, AFAS, Twinfield, and Snelstart — no manual re-entry.

Instead of building credit notes line by line in a spreadsheet, you let the platform reverse the right invoice with the right VAT and you keep selling.

Issue Perfect Credit Notes — Automatically

Winkel Factuur turns any invoice into a compliant credit note that references the original, reverses the exact VAT, and keeps your books and VAT return audit-ready across Amazon, bol.com, Shopify, and WooCommerce. 14-day free trial, plans from €9/month.