Counterfoil rule note

UBL-CR-001

Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.

Country
EU
Syntax
UBL
Severity
warning
Last verified
2026-10-18

Official statement

A UBL invoice should not include extensions

Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-CR-001/

Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL

Severity note: warning, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.

Plain-language reading

A UBL invoice should not include extensions. The statement says "should not", not "shall", and it has no period. It says "extensions" and does not say "the". The flag is warning. The context is the same string as BR-CO-18. The published test is not(ext:UBLExtensions). It does not call exists. It does not read a cbc child.

What to change

Leave extensions out of the UBL invoice.

Illustration

Illustration of the condition in the official statement. Not an example published by the source.

Fails the stated condition. The invoice includes a UBL extension.

Passes the stated condition. The invoice includes no UBL extension.

Published context and test

Copied from the source. Not reimplemented on this page.

/ubl:Invoice | /cn:CreditNote
not(ext:UBLExtensions)

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