Business document
Credit Note
A document reducing or cancelling an invoice that has already been issued. It is the only correct way to fix an invoice — and its reason code is the most honest report a company has about where the quote-to-cash chain is failing.
Also called: Credit memo · Credit memorandum · Sales credit
- Who sends it
- The supplier's finance function, on approval, and normally to the same accounts payable destination as the original invoice.
- Who receives it
- The customer's accounts payable function, who offset it against the invoice or against future payments.
- When it is used
- When goods are returned or rejected, when an invoice was raised in error or for the wrong quantity or price, when a post-invoice discount or rebate is agreed, or when a dispute is settled.
- Does it bind anyone
- A formal tax document in most jurisdictions with prescribed content, adjusting the tax originally charged. It also amends the underlying receivable. Like the invoice, it is jurisdiction-specific and worth confirming with your accountant rather than assuming.
What it is
A credit note reduces the amount a customer owes on an invoice that has already been issued. It might cancel the invoice entirely — because it was wrong, or the goods came back — or reduce it, because the quantity was overstated, the price was wrong, or something was agreed after the fact.
It exists because issued invoices cannot be edited. Invoice numbering has to be sequential and unbroken, and both parties' tax records already contain the original. So the correction has to be a second document that references the first, leaving an audit trail that shows what was charged, what was credited, and why.
The 'why' is the part most companies waste. Credit notes are raised, coded to a generic reason like 'customer complaint', and forgotten. Analysed properly by cause, they are the single most honest report available on how well the whole chain is running — because every credit note is an admission that something upstream went wrong and the customer noticed.
Every field explained — 18 in total
What each field means, a realistic example value, whether you can leave it out, and the thing that goes wrong with it in practice.
| Field | What it means | Example | Needed? |
|---|---|---|---|
| The words 'Credit Note' | Explicit identification of the document type.Watch out It must be unmistakable. A credit note that looks like an invoice can be posted as one by the customer, which doubles the problem instead of solving it. | CREDIT NOTE | Required |
| Credit note number | A unique sequential identifier, from its own sequence or the invoice sequence. | CN-2026-00841 | Required |
| Credit note date | Date of issue, and normally the tax point of the adjustment.Watch out Raising it in a later tax period than intended moves the tax adjustment with it. At period ends, check which return it will land in. | 6 May 2026 | Required |
| Original invoice number and date | The invoice being credited.Watch out The field that makes it a credit note rather than a mystery. An unreferenced credit cannot be matched by the customer and ends up as unapplied cash on their ledger and an open item on yours. | Against INV-2026-04417 dated 17 April 2026 | Required |
| Customer's purchase order number | The order the original invoice billed against.Watch out Needed for the same reason as on the invoice — their system matches on it. A credit note that cannot be matched will not be offset, and the customer will keep paying the disputed invoice or, more often, keep not paying it. | PO 4500-887-2261 | Required |
| Supplier and customer details, tax registrations | The same identifying information as the original invoice.Watch out Must be the same legal entities as the original invoice. Crediting a different entity in the same group creates two problems instead of one. | Rochdale Precision Ltd, VAT GB 771 4482 09 → Northgate Shared Services, VAT PL 5252445719 | Required |
| Reason for the credit | Why the credit is being issued, in plain language.Watch out Often reduced to a meaningless code. This field is the whole diagnostic value of the document — 'quality reject', 'short delivery', 'price error' and 'goodwill' are four different companies' worth of problem, and lumping them together hides all four. | 12 units short-delivered on DN-58117 and invoiced in error | Required |
| Reason code | A structured category for analysis.Watch out Keep the list short and mutually exclusive. A list of thirty codes gets used as a list of three, and the rest are noise. | SD — short delivery | Conditional |
| Line description | What is being credited, matching the original invoice line. | NG-44821 Mounting bracket LH, rev D — invoiced not delivered | Required |
| Original invoice line reference | Which line of the original invoice this credits.Watch out Required by systems that match at line level, which is most large ERPs. | Credits invoice line 010 | Conditional |
| Quantity credited | How many units the credit covers.Watch out Where goods have been physically returned, this must equal what was actually received back — not what the customer said they were sending. | 12 | Required |
| Unit price and line credit value | The value being credited, at the price originally invoiced.Watch out Credit at the price originally charged, not the current price. Crediting at a different price leaves a residual balance nobody can explain later. | £17.20 each, £206.40 | Required |
| Net credit total | The amount before tax. | £206.40 | Required |
| Tax rate, amount and treatment | The tax being reversed, at the rate originally charged.Watch out Must mirror the treatment on the original invoice. Crediting at a rate that has changed since, or omitting the reverse-charge wording that was on the original, creates a tax mismatch on both sides. | VAT @ 20% — £41.28 | Required |
| Gross credit total | The total amount credited.Watch out Shown as a positive value on a document clearly labelled as a credit, or as a negative on an invoice-style layout — but consistently. Sign errors here are common and produce a debit where a credit was intended. | £247.68 | Required |
| Return authorisation reference | The RMA or returns reference, where goods came back.Watch out Credit should follow physical receipt of the returned goods, not the customer's notification of intent to return. Crediting first and receiving later is how stock and ledger drift apart. | RMA-2026-0219 | Conditional |
| How the credit will be settled | Whether it is offset against the invoice, against future invoices, or refunded.Watch out State it explicitly. Left unstated, the customer decides, and an open credit sitting on their ledger for a year is money you have given away without collecting the goodwill for it. | To be offset against INV-2026-04417 | Required |
| Authorised by | Who approved the credit, at the appropriate level.Watch out Credit notes are where revenue quietly leaves a business. They deserve the same approval discipline as a discount, because that is exactly what they are. | Approved: S. Nandakumar, Finance Manager | Required |
A filled-in example
Realistic values throughout — the sort of document that would actually pass through a business.
Credit Note CN-2026-00841
- Credit note
- CN-2026-00841
- Date
- 6 May 2026
- Against invoice
- INV-2026-04417, 17 April 2026
- Customer PO
- 4500-887-2261
- Customer
- Northgate Engineering (Holdings) Ltd, Shared Services, Kraków
- Reason
- Short delivery invoiced in error (code SD)
- Settlement
- To be offset against INV-2026-04417
| Credits inv. line | Description | Qty | Unit price | Net credit |
|---|---|---|---|---|
| 010 | NG-44821 Mounting bracket LH, rev D — invoiced 400, delivered 388 | 12 | £17.20 | £206.40 |
- Net credit
- £206.40
- VAT @ 20%
- £41.28
- Total credit
- £247.68
- Note
- Balance of 12 units delivered on DN-58204 and invoiced separately on INV-2026-04688.
- Approved by
- S. Nandakumar, Finance Manager
What happens next
- 01The credit note is sent to the same destination as the original invoice, by the same route.
- 02The customer posts it and offsets it against the invoice, or holds it against future payments.
- 03The supplier's receivables ledger is reduced, and the invoice either clears or remains open for the reduced balance.
- 04Where goods were returned, they are received back into stock, inspected, and either reworked, scrapped or restocked.
- 05The reason code feeds a periodic review of why credits are being raised at all — which is where the value of the document actually lies.
Where it appears in the chain
- Raising the invoiceConverting a completed delivery into a demand for payment that the customer's systems can match and approve without a human having to intervene.
- Accounts receivable and collectionManaging what customers owe from the moment the invoice is issued until the money arrives — chasing before it is due, resolving queries fast, and escalating in a defined order.
- Payment and cash applicationThe money arrives — and then has to be matched to the right invoices, on the right accounts, so the ledger reflects reality and nobody chases a customer who has already paid.
Common mistakes
MistakeCrediting without referencing the original invoice
Why it happens: The credit is raised quickly to settle a dispute and the reference field is optional in the system.
What to do instead: Make the original invoice number mandatory. An unreferenced credit cannot be matched by either side and simply moves the problem onto the ledger.
MistakeUsing one generic reason for everything
Why it happens: 'Customer complaint' covers every case and requires no thought at the moment of raising.
What to do instead: A short list of mutually exclusive causes, reviewed quarterly. Credits caused by despatch errors, by pricing errors and by genuine quality failures point at three completely different fixes.
MistakeCrediting before the goods come back
Why it happens: The customer says they are returning them and the relationship matters.
What to do instead: Credit on receipt and inspection. Otherwise the ledger and the stock disagree, and some of those goods never arrive.
MistakeEditing the original invoice instead
Why it happens: It is faster, and the customer has not paid it yet.
What to do instead: Never. It breaks the number sequence and the tax record, and leaves two versions of one invoice number in circulation.
MistakeNo approval threshold
Why it happens: Credit notes are seen as administrative corrections rather than as revenue leaving the business.
What to do instead: Approve them like discounts, with a value threshold and a named approver. A company that cannot say who authorised its credits cannot control them.
MistakeCrediting instead of fixing the cause
Why it happens: The credit closes the immediate argument and is quick. The despatch error, the pricing error or the process gap that produced it stays exactly where it was.
What to do instead: Route every credit back to the function that caused it, with the evidence. Finance owns the ledger; it does not own the root cause.
Terminology
- Debit note
- The mirror image — a document increasing the amount owed, often raised by the customer to notify a deduction they intend to take.
- RMA
- Return material authorisation. The reference issued before goods come back, so returns can be identified on arrival.
- Deduction / chargeback
- An amount the customer withholds unilaterally. Frequently precedes the credit note that formalises it, sometimes by months.
- Rebate
- A retrospective discount based on volume achieved over a period, normally settled by credit note.
- Write-off
- Abandoning a balance as uncollectable, which is an accounting decision rather than a credit against a supply.
- Offset
- Applying a credit against an open invoice so that only the net amount is paid.
Common questions
›When should a credit note be used instead of amending the invoice?
Always, once the invoice has been issued. Invoice numbering must be sequential and unbroken, both parties' tax records already hold the original, and an edited invoice leaves two documents with the same number. The credit note is not a workaround — it is the mechanism.
›What is the difference between a credit note and a refund?
A credit note reduces what is owed. A refund returns money already received. If the invoice is unpaid, a credit note settles it; if it has been paid, a credit note creates a balance in the customer's favour that is either offset against future invoices or refunded. Which of those happens should be stated on the document rather than left to the customer to decide.
›What is the difference between a credit note and a debit note?
A credit note is issued by the supplier and reduces what the customer owes. A debit note is normally issued by the customer to notify the supplier of an amount they intend to deduct. A debit note is a claim, not an accounting entry on your books — it becomes one only when you accept it and issue the corresponding credit.
›Does a credit note have to be sent to the same place as the invoice?
Yes, and by the same route. A credit note emailed to the buyer while the invoice went through a portal will not be matched, and the customer will continue to hold the full invoice as outstanding.
›What do credit notes tell you about the business?
More than almost any other document, if the reasons are coded honestly. Every credit note is a case where something went wrong and the customer noticed. Grouped by cause, they point directly at the failing step — despatch quantities, pricing, order entry, quality — and unlike most internal metrics, the customer has already validated each one.
›Should credit notes be approved?
Yes, with a threshold and a named approver, exactly like a discount. Revenue leaves a business through credit notes as easily as through pricing, and with far less scrutiny in most companies.
Tools for this
Downloadable, self-contained, and yours to keep — they run in a browser with no account and no data leaving your machine.
- Customer Return & RMA TrackerProTrack physical customer returns from RMA request through receipt, inspection and disposition to credit — with days open, transit time, the no-fault-found rate and an honest split of who actually caused each return; for the customer's complaint itself use the complaint tracker. Nothing is uploaded.
- Customer Complaint TrackerProTrack customer complaints from intake to closure — acknowledgement and resolution times, justified rate, complaint costs and category trends, with a customer-ready report. Nothing is uploaded.
- Accounts Receivable AgingFreeAge your unpaid invoices into buckets, see what is overdue and by how far, work out days sales outstanding, and print a chase list for whoever is collecting. Runs in your browser. Nothing is uploaded.
Reviewed 2026-08-15. Nothing here is legal, tax or accounting advice — the mandatory content of commercial and tax documents varies by jurisdiction, so confirm the specifics for where you trade.