BR-56

Every tax representative party (BG-11) must carry its VAT identifier (BT-63). Without it the representation cannot be traced for tax purposes.

Severity: Error
Applies to: CII, UBL
Rule set: v2026-01-31

Official rule text

Each Seller tax representative party (BG-11) shall have a Seller tax representative VAT identifier (BT-63).

Why does BR-56 happen?

The representative is treated as one more address and mapped like an address — name, city, country. That a tax identifier is mandatory here rather than merely useful gets lost.

How do you fix BR-56?

Set BT-63 in cac:TaxRepresentativeParty/cac:PartyTaxScheme/cbc:CompanyID with a cac:TaxScheme/cbc:ID of VAT in UBL, or the representative's ram:SpecifiedTaxRegistration/ram:ID in CII. The country prefix is required by BR-CO-09.

In the XML

A UBL fragment. The CII path is named above — same change, different element names.

Fails

<cac:TaxRepresentativeParty>
  <cac:PartyName>
    <cbc:Name>Steuerkanzlei Muster</cbc:Name>
  </cac:PartyName>
</cac:TaxRepresentativeParty>

Fixed

<cac:TaxRepresentativeParty>
  <cac:PartyName>
    <cbc:Name>Steuerkanzlei Muster</cbc:Name>
  </cac:PartyName>
  <cac:PartyTaxScheme>
    <cbc:CompanyID>DE811234567</cbc:CompanyID>
    <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
  </cac:PartyTaxScheme>
</cac:TaxRepresentativeParty>

NormAPI provides technical validation, not tax or legal advice.