Check the billing specification identifier

How to fix it

For the supported Billing profile, use the identifier below as CustomizationID. Do not substitute a self-billing identifier or the business-process ProfileID.

Example

<cbc:CustomizationID>urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0</cbc:CustomizationID>

Examples are illustrative fragments, not complete invoices. Validate the complete document after applying a fix.

Scope and source

Reviewed for Peppol BIS Billing 3.0.21 (May 2026), EN 16931 1.3.16. Guidance version 2026-09-06.1, checked 2026-09-06. Applies to the Invoice and CreditNote rulesets named by the validator.

Official Peppol rule and test

Guidance does not change the engine verdict. Other findings may need separate fixes. Validation does not certify legal or tax compliance or transmit a document over Peppol.