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Invoicing
Credit note
A document that reduces or cancels an amount previously invoiced, used for refunds, corrections and downgrades.
A credit note reverses part or all of an issued invoice. It is how billing corrects itself without editing history.
Common causes are a genuine billing error, a downgrade mid-cycle, a goodwill adjustment, or a service credit under an SLA.
A credit note reduces what is owed; it is not the same as a refund, which moves money back. A customer can hold a credit balance that is applied to their next invoice without any money ever changing hands, and the accounting treatment of the two differs.