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BR-CO-26

The invoice gives no identifier for the seller: no VAT identifier (BT-31), no commercial register number (BT-30) and no other identifier …

Validation rule of EN 16931 (CEN, rule set 1.3.16) · Level: Error

What the message means

The invoice gives no identifier for the seller: no VAT identifier (BT-31), no commercial register number (BT-30) and no other identifier (BT-29). A tax number alone is not enough.

What the issuer needs to change

Give at least one of them, usually the VAT number.

Fields concerned

Your invoice reports BR-CO-26? Check it with SmartFormular E-Rechnung lite, free to try until 31 December 2026: the tool shows every finding with an explanation, the invoice in readable form and a GiroCode to pay – in your browser, no upload.

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Origin

Rule set
EN 16931 (CEN, rule set 1.3.16)
Syntax
CII, UBL
Level
Error

Original rule text

In order for the buyer to automatically identify a supplier, the Seller identifier (BT-29), the Seller legal registration identifier (BT-30) and/or the Seller VAT identifier (BT-31) shall be present.

Source: CEN/TC 434, EN 16931 validation rules 1.3.16, European Union Public Licence 1.2

Technical details for IT

UBL

Context: cac:AccountingSupplierParty
Test: not(exists(cac:Party/cac:PartyTaxScheme[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']/cbc:CompanyID) or exists(cac:Party/cac:PartyIdentification/cbc:ID[not(@schemeID = 'SEPA')]) or exists(cac:Party/cac:PartyLegalEntity/cbc:CompanyID))

CII

Context: //ram:SellerTradeParty
Test: not((ram:ID) or (ram:GlobalID) or (ram:SpecifiedLegalOrganization/ram:ID) or (ram:SpecifiedTaxRegistration/ram:ID[@schemeID='VA']))

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Technical explanation by robin.vision, not tax or legal advice. Rules as of 31 August 2026 (KoSIT validator configuration).