PEPPOL-EN16931-R043

Explanation

An allowance or charge must be clearly marked as an allowance (reducing the amount) or a charge (increasing it). Here that marking is missing or has an invalid value. This applies to allowances and charges on the whole invoice and on individual lines.

How to fix

Ask the seller whether an allowance or a charge is meant before booking the invoice, and ask for a corrected invoice. This usually comes from the seller's invoicing software, not from data entry.