What is a cancellation (storno) invoice?

A cancellation invoice voids an earlier invoice with the same amounts in the opposite sign. The original is not deleted: the two stay linked, so it is always clear what happened.

An issued invoice cannot be edited or deleted afterwards: instead you issue a cancellation invoice that zeroes out the original. If the invoice was wrong, issue a new, correct one after the cancellation.

Recording a cancellation. On the invoice page choose Cancel invoice in the More actions menu. The system creates the cancellation document with the amounts in the opposite sign and links it to the original. Cancellation invoices downloaded from NAV are linked to their originals as well.

If the invoice was already paid, the money is owed back. That is not an error: the invoice chain becomes "Overpaid", which shows in the invoice list and on the Record cash movements page. There the header shows the refund due as a separate figure beside the open receivables. The chain stays open until the refund is recorded – deliberately, so it is not forgotten. Record the refund with Record refund in the invoice's More actions menu.

What is not sent to bookkeeping (Cashbook): a cancellation with no existing original, because the original was deleted in the meantime or the cancellation was never linked to it. A standalone negative document cannot be booked correctly, so it is skipped, and the cancelled original is not sent again as a live invoice either.