PEPPOL-EN16931-R001

Explanation

PEPPOL requires a business process identifier (ProfileID, BT-23). It tells the recipient in which context the invoice should be processed — e.g., standard billing or a specialized profile. This value is normally set by your invoicing software.

How to fix

Add a ProfileID element, typically 'urn:fdc:peppol.eu:2017:poacc:billing:01:1.0'. (Typically a software-side issue, not user input — raise this with your invoicing software vendor; if you're receiving the invoice, ask the sender to address it with theirs.)