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BR-CL-08 - Invoice note subject code: UNCL 4451

The invoice note subject code (BT-21) must use the UNCL 4451 code list.

BR-CL-08 - Invoice note subject code: UNCL 4451

The invoice note subject code (BT-21) must use the UNCL 4451 code list.

Code listsEN 16931BT-21 Error

What this rule checks

The invoice note subject code (BT-21) must use the UNCL 4451 code list.

How to fix it

Use a valid UNCL 4451 subject code for the invoice note.

Validate against this rule

This rule is part of EN 16931. Check your invoice with the validator that matches your format:

UBL / PeppolXRechnungFactur-X / ZUGFeRD

Related rules

BR-CL-01Invoice type code: UNTDID 1001BR-CL-03Amount currency (@currencyID): ISO 4217BR-CL-04Invoice currency code: ISO 4217BR-CL-05VAT accounting currency code: ISO 4217BR-CL-06VAT point date code: UNTDID 2005BR-CL-07Object identifier scheme: UNTDID 1153

Source: CEN EN 16931 Schematron · Last verified: 2026-07-10

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