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# "We need a credit." How do I handle ?

As not everyone is a fan of accounting, here's a little overview of what a credit note is.

A credit note is a document that allows the **cancellation of an incorrect invoice** (in case of duplication, for example) or the refund of a purchase.
Basically, it's like an invoice, but negative.

When issuing a credit note, you need to specify:
- Which invoice it cancels (number/name)
- The amount, and if necessary, the VAT (just like on a regular invoice).
And the final amount must be negative.

It's simple, but it avoids a real mess.