What is a credit note, and how do they work?

As a business owner, you can’t just pretend the mistake didn’t happen. Luckily, there’s a simple solution for situations like these: credit notes.

We’ll explain what a credit note is, how it works, when it should be used, and what information it typically contains.

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Key takeaways:

• A credit note is a document used to reduce or cancel all or part of an invoice.
• Businesses commonly issue credit notes for returns, refunds, pricing errors, or cancelled orders.
• Credit notes help keep accounting and VAT records accurate.
• A credit note doesn't create a new sale – it adjusts a previous transaction.

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What is a credit note?

A credit note (sometimes called a credit memo) is a document issued by a seller to reduce or cancel an amount previously charged to a customer.

Think of it as the opposite of an invoice – an invoice increases the amount a customer owes, while a credit note reduces it.

Businesses often issue credit notes when:

• Goods are returned
• Services are cancelled
• An invoice contains an error
• A customer has been overcharged
• A refund is due

Rather than deleting or changing the original invoice, the credit note creates a clear record of the adjustment.

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How does a credit note work?

A credit note is linked to an existing invoice and reduces the value of that invoice by a specified amount.

For example:

• Original invoice: £500
• Credit note issued: £100
• Outstanding balance: £400

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Or:

• Original invoice: £500
• Credit note issued: £500
• Outstanding balance: £0

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This creates a clear audit trail showing exactly what changed and why.

For businesses that are VAT registered, credit notes can also help ensure VAT records remain accurate.

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What does a credit note include?

A credit note typically contains:

• A unique credit note number (different from your invoice sequence)
• The date it was issued
• Customer details
• Business details
• The original invoice number
• The reason for the credit
• The amount being credited
• Any applicable VAT adjustments
• The VAT number (if relevant)

The exact format may vary, but the goal is always the same: to clearly explain what is being adjusted and why.

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Credit note example

To make it a little more tangible, here’s a simple example of how credit notes work:

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1. The original purchase

A restaurant orders:

• 10 dining chairs for £100 each
• Total invoice: £1,000

The supplier issues an invoice and the restaurant pays.

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2. A problem occurs

Two of the chairs arrive damaged and need to be returned.

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3. The supplier issues a credit note

The supplier creates a credit note for £200, reflecting the value of the returned chairs.

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4. The adjustment is recorded

The original £1,000 sale remains on record, but the credit note reduces the final value of the transaction to £800.

This creates a clear paper trail for both businesses.

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When should you issue a credit note?

There are several situations where a credit note may be appropriate:

• Returned goods: A customer returns products after purchase.
• Invoice errors: The wrong amount was charged or incorrect quantities were invoiced.
• Damaged products: Goods arrive damaged or faulty and compensation is required.
• Cancelled orders: An order is cancelled after the invoice has already been issued.
• Goodwill adjustments: A business chooses to offer a partial credit to resolve a customer issue.

In each case, the credit note provides a formal record of the adjustment. This way, both sides are up to date with the situation and how it was solved.

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Credit note vs refund – what’s the difference?

Although they're related, a credit note and a refund aren’t the same thing.

A credit note adjusts the accounting records and reduces the value of a previous invoice. A refund, on the other hand, returns money to the customer.

In some situations, issuing a credit note may lead to a refund. In others, the credit may simply be applied to a future purchase.

You might also be interested in: How long do refunds take? Credit and debit card refunds explained

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Why are credit notes so important?

Credit notes help businesses with several key bookkeeping challenges:

• Maintaining accurate records: With credit notes, every adjustment is documented clearly – nothing slips between the cracks.
• Supporting VAT reporting: Credit notes ensure VAT calculations reflect the correct transaction value.
• Avoiding invoice confusion: Instead of altering historical invoices, businesses can create a transparent record of changes.
• Resolving customer issues professionally: Credit notes provide a formal process for handling returns and corrections, which helps improve customer satisfaction.

For small businesses, this makes bookkeeping cleaner and easier to manage – and that helps keep everyday operations running smoothly.

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How a POS system can help keep records organised

For businesses that regularly process sales and refunds, keeping records organised is essential. That’s where a POS system can make all the difference.

A modern POS system can help by:

• Tracking sales and refunds automatically
• Creating a clear transaction history
• Generating sales reports
• Keeping records organised in one place
• Simplifying reconciliation and bookkeeping

The easier it is to track transactions, the easier it becomes to manage adjustments like refunds and credit notes.

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“Most small business owners don’t have time to dig through spreadsheets to find transaction details. A reliable POS system gives you the information you need, when you need it, and that makes a huge difference when it comes to staying organised and in control.”

Camila Gaechter, Product Specialist, Flatpay UK

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Common questions about credit notes

Is a credit note the same as a refund?

No. A credit note records an adjustment to a previous invoice, while a refund returns money to the customer.

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Can a credit note be used instead of a refund?

Sometimes. Depending on the situation, a business may offer credit toward future purchases rather than returning cash immediately.

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Does a credit note cancel an invoice?

It can. A credit note may partially reduce an invoice or fully cancel it, depending on the amount issued.

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Is a credit note legally required?

If you need to adjust a VAT invoice after it has been issued, a credit note is often the appropriate way to document the change.

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Does a credit note affect VAT?

Yes. Credit notes can be used to adjust the VAT associated with a previous transaction, helping ensure records remain accurate.

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A simpler way to handle transactions

Returns, corrections, refunds – they’re all normal parts of running a business. What matters is having a clear process for how to handle them.

Flatpay helps your business stay organised with:

• £0 monthly fees
• 1.69% flat transaction rate
• Clear transaction reporting
• Simple payment management
• No hidden charges

Because when your records are easy to follow, managing day-to-day operations becomes much simpler.