Peppol BIS Billing 3.0 · rule

UBL-CR-678

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does UBL-CR-678 mean? A UBL invoice should not include the TaxCategory/ID schemeID

Why did my invoice fail UBL-CR-678?

The schemeID attribute on cac:TaxCategory/cbc:ID should not be used. The document-level VAT category code (BT-118) is defined by EN 16931 as a code from UNCL5305 without any scheme qualifier, so the attribute is outside the core model and validators warn on it. Use the bare category code (S, Z, E, AE, K, G, O, L, M).

Official rule text

A UBL invoice should not include the TaxCategory/ID schemeID

Common causes

Library emits schemeID="UNCL5305" or schemeID="UN/ECE 5305" on tax category IDs
Templates carried over from older CEN BII or OIOUBL profiles

How do I fix it?

<cac:TaxCategory>
  <cbc:ID>S</cbc:ID>
  <cbc:Percent>22</cbc:Percent>
  <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
</cac:TaxCategory>

Check your invoice against this rule

Paste it into the live demo, or call POST /v1/validate. See the quickstart.