How to issue a credit note in Malaysia without rewriting old invoices

What a credit note actually does

A credit note (Nota Kredit / 贷记单) is a standalone reduction document tied to an already issued invoice. It does not delete the original invoice and is not itself a bank transfer. Together, the original invoice plus the credit note show the true net amount payable and why it changed.

When to use a credit note — and when not to

Situation	Right document
Customer returns damaged or unused stock	Credit note referencing the original invoice
Quantity or unit price was overbilled on an issued invoice	Credit note for the overcharged difference
Post-delivery discount agreed in writing	Credit note stating the agreed adjustment
Draft not yet sent to the customer	Edit the draft directly before issuing
Customer refuses to pay and you stop chasing	Not a credit note — review bad-debt treatment with your accountant

Seven details every credit note should carry

1. Clear CREDIT NOTE heading so nobody mistakes it for a new bill.
2. Dedicated credit note number (for example, CN-0007) on its own sequence rather than mixed into invoice numbers.
3. Original invoice number reference (such as INV-0182).
4. Issue date of the credit note.
5. Specific reason for the reduction — returned goods, billing correction or agreed allowance.
6. Itemised reduction amount in the same currency as the source invoice.
7. Updated remaining balance on the original invoice after applying the credit.

Worked example in MYR

Document	Description	Amount
INV-0182	Original issued invoice	RM1,175.94
CN-0007	2 cartons returned due to transit damage	−RM105.60
Net amount payable by customer		RM1,070.34

Both documents stay on file, the numbers reconcile on sight, and your customer's accounts team can approve the RM1,070.34 payment without back-and-forth calls.

Frequently asked questions

Can I edit an already issued invoice instead of sending a credit note?

Once a customer has received or booked your invoice, editing the old file creates two conflicting versions under the same invoice number. Issuing a linked credit note preserves the original invoice and records the exact reduction and reason.

Is a credit note the same as a cash refund?

No. A credit note reduces the amount owed on an issued invoice. If the customer has not paid yet, they pay the reduced balance; if they already paid in full, the credit can be applied by agreement or settled separately with a refund record.

Should I issue a credit note when a customer refuses to pay?

No. An unpaid invoice that you stop chasing is a bad debt question for your accountant, not a credit note. Issuing a credit note would make your records look as if you voluntarily waived the charge. In InvoisLaju, linked credit notes are unlimited on the free plan (RM0, 3 footer-free exports each month; Pro is RM19.99 a month, RM129.99 a year or RM269.99 once), must reference an issued invoice, require a reason and cannot exceed the invoice total.

Read next: Invoice vs quotation · SST invoice format Malaysia · 贷记单怎么用 (中文) · All guides