PEPPOL-EN16931-R004 - Specification identifier must be Peppol BIS Billing 3.0
The specification identifier (BT-24) tells the receiver which rule set the document claims to follow. For Peppol BIS Billing 3.0 it must be exactly urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0.
PEPPOL-EN16931-R004 - Specification identifier must be Peppol BIS Billing 3.0
The specification identifier (BT-24) tells the receiver which rule set the document claims to follow. For Peppol BIS Billing 3.0 it must be exactly urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0. This is a Peppol BIS Billing 3.0 rule. It applies on top of the EN 16931 core standard, on invoices exchanged over the Peppol network.
What this rule checks
The specification identifier (BT-24) tells the receiver which rule set the document claims to follow. For Peppol BIS Billing 3.0 it must be exactly urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0.
How to fix it
Replace the content of cbc:CustomizationID with that exact string, without extra spaces or line breaks.
Validate against this rule
This rule is part of EN 16931. Check your invoice with the validator that matches your format:
Related rules
Source: OpenPeppol BIS Billing 3.0 · Last verified: 2026-07-10
All validation rules