How to Write a Credit Note (Free Template)

A customer returns goods, you overcharged them, or a discount is applied after the invoice went out — now you owe them money, and an invoice alone won't fix your books. That's what a credit note is for: it formally reverses part or all of an invoice so your accounting (and your customer's) stays accurate. Here's what to put on one, when to issue it, and how to create it in minutes.

Credit note vs debit note: which one do you need?

• Credit note (credit memo) — reduces what the customer owes. Use it for returns, refunds, price corrections in your favour, or goodwill discounts. It is effectively a "negative invoice".
• Debit note — increases what the customer owes. Use it when you underbilled, charged for extra work after invoicing, or need to correct a mistake in the customer's favour direction. SleekKitBox also has a debit note template for that case.

If you're not sure whether a situation calls for a credit note or a debit note, ask yourself one question: does the customer now owe less (credit note) or more (debit note)?

When to issue a credit note

• Returns — the customer sent goods back and should no longer pay for them.
• Overcharging or billing errors — wrong quantity, wrong price, or a duplicate invoice.
• Damaged or short deliveries — you agree to reduce the amount instead of taking the goods back.
• Discounts and rebates — a retroactive price reduction or volume rebate agreed after invoicing.
• Cancellations — a service was cancelled part-way and you refund the unused portion.

What every credit note should include

• Your business details — name, VAT/tax number where relevant, and address (mirror the original invoice).
• Customer details — name and address so the credit lands on the right account.
• A clear "Credit Note" title — never call it an invoice; mixing the two confuses both your books and the customer's.
• Your credit note number and date — keep a separate sequence from invoices so auditors can follow the trail.
• The original invoice number it references — this is the field auditors and accountants look for first.
• The reason for the credit — refund, return, discount or cancellation. A one-line reason prevents "what was this for?" emails later.
• The credited items — description, quantity and unit price, matching the lines being reversed.
• The credited amount — shown with tax, matching how the original invoice showed it (tax-inclusive or exclusive).
• Your notes — restocking fee, replacement arrangements, or how the credit will be settled (refund vs offset against a future invoice).

Tax notes (keep it short — ask your accountant)

If you charged VAT/GST on the original invoice and the sale is being reversed or corrected, the credit note usually needs to adjust the tax you reported for that period — don't just subtract the total in your spreadsheet. When only part of an invoice is credited, credit the exact lines affected so the tax splits stay correct. Rules vary by country and tax type, so when in doubt, let your accountant or tax authority guidance decide whether the credit note must show tax separately.

How to create yours with SleekKitBox

1. Open the free Credit Note template.
2. Enter your business and customer details, the credit note number/date, and reference the original invoice number.
3. Add the items being credited (with the reason) — the form calculates the credited total for you.
4. Download the PDF and send it to your customer. Need to attach it to an email with supporting documents? Combine several PDFs into one first so everything arrives in a single file.

A proper paper trail matters more than it feels like it should: when a customer disputes a charge months later, the original invoice plus its credit note is the proof that the account was settled correctly. Keeping your numbering sequential — even when a credit note never gets used — is the habit that makes that trail audit-proof.

Frequently asked questions

Do I need to issue a credit note, or can I just send a refund? A refund moves money; a credit note explains why in your books. Accountants need the paper trail to match the bank movement, so issue one for every return or correction that changes an invoice's value.

Can a credit note be negative (a debit note)? No — a credit note only reduces amounts owed. If you need to charge more after invoicing, issue a debit note instead; mixing them muddies your tax records.

Should a credit note reference the original invoice? Yes, always include the original invoice number. Unreferenced credits are a red flag to auditors and a headache for your customer's accounts payable team.

Is a credit note the same as a refund receipt? No. A credit note is issued before money moves; a refund receipt (payment receipt with a negative value or marked refund) documents the money leaving your account afterwards.

👉 Create your credit note: free Credit Note template →