What a credit note is

Every entry in a set of accounts should point back to a piece of paper, or its digital equivalent, that proves the transaction happened. These are called source documents.

Most people quickly learn about the invoice. Its partner document, the credit note, gets less attention. Knowing what it is and when it is used fills an important gap in how transactions are recorded.

A document for reducing an amount owed

A credit note reduces the amount a customer owes, or that a business owes a supplier. It is issued when something needs to be taken off a bill already raised. Perhaps goods were returned, arrived damaged, or the customer was overcharged.

In each case the original amount was too high, and the credit note is the formal record that lowers it. An invoice says “you owe this much”. A credit note says “reduce what you owe by this much”.

When a credit note is issued

The most common reason is a return of goods. When a customer sends items back, the seller issues a credit note so the customer no longer owes for them.

A credit note is also used to grant an allowance, a reduction given without goods coming back. For example, goods may be slightly faulty but the customer agrees to keep them at a lower price.

It may also correct an error, such as an overcharge on the invoice. The shared theme is that an amount already billed needs to come down.

How it differs from an invoice

An invoice and a credit note have opposite effects. An invoice records that goods or services were supplied and money is owed.

It increases the amount the customer must pay. A credit note reduces it.

If an invoice for RM600 was sent and RM100 of goods came back, a credit note for RM100 brings the amount owed down to RM500. The invoice created the debt and the credit note trims it. Seeing them as a pair, one raising and one reducing, makes the role of each clearer.

Two views of the same document

The same credit note reads differently on each side of the deal. To the seller who issues it, it records goods returned by a customer, a return inwards. To the buyer who receives it, it records goods returned to a supplier, a return outwards.

So one credit note tells the seller to expect less money and tells the buyer they owe less.

Why the source document matters

If amounts owed could be reduced whenever someone felt like it, the accounts would be open to error and dispute. A credit note gives a dated, written reason for the reduction. Anyone reviewing the accounts later can see why an amount changed.

Entries should rest on objective proof, not memory or assertion. The credit note is the proof that a return or allowance took place.

Where the information goes next

A source document is the starting point. Once a credit note exists, its information flows into the business’s books.

It feeds the records of returns and the amounts owed by or to each party. Later entries all trace back to it.

So the document must be accurate and clear. Any mistake on the credit note would carry through everything recorded from it.

A note about the word “credit”

Students sometimes assume “credit” in credit note refers to the credit side of double entry. It is easier to read it in the everyday sense of crediting an account in the customer’s favour. The customer is credited, because they no longer owe as much.

Reading the name this way avoids forcing a double entry meaning onto it before you decide how it will be recorded.

Summary

A credit note is the source document that records a reduction in an amount owed, most often because goods were returned or an allowance was given. It mirrors the invoice.

The invoice creates a debt and the credit note reduces it. It matters because it gives reliable, dated evidence for the reduction.

If credit notes and source documents still feel unclear, one of our teachers can work through sample documents with your child and the entries that follow from them. Book a trial class

Syllabus reference: Cambridge 0452 and 0985, syllabus for 2027 to 2029, sub-topic 2.2 Business documents (page 12).