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BR-Z-02

For lines with "zero rated" (Z), the seller's VAT number or tax number (BT-31, BT-32) is missing

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

What the message means

For lines with "zero rated" (Z), the seller's VAT number or tax number (BT-31, BT-32) is missing.

What the issuer needs to change

Add the missing numbers.

Fields concerned

BT-31 seller VAT identifier
BT-32 seller tax registration identifier
BT-63 seller tax representative VAT identifier
BT-151 invoiced item VAT category code

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Origin

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

Original rule text

An Invoice that contains an Invoice line where the Invoiced item VAT category code (BT-151) is "Zero rated" shall contain the Seller VAT Identifier (BT-31), the Seller tax registration identifier (BT-32) and/or the Seller tax representative VAT identifier (BT-63).

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

Technical details for IT

UBL

Context: /ubl:Invoice | /cn:CreditNote
Test: not((exists(//cac:ClassifiedTaxCategory[normalize-space(cbc:ID) = 'Z'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']) and (exists(//cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID) or exists(//cac:TaxRepresentativeParty/cac:PartyTaxScheme[cac:TaxScheme/(normalize-space(upper-case(cbc:ID)) = 'VAT')]/cbc:CompanyID))) or not(exists(//cac:ClassifiedTaxCategory[normalize-space(cbc:ID) = 'Z'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT'])))

CII

Context: //rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem/ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode = 'Z'][upper-case(ram:TypeCode) = 'VAT']
Test: not(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:SpecifiedTaxRegistration/ram:ID[@schemeID = ('VA', 'FC')] or /rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTaxRepresentativeTradeParty/ram:SpecifiedTaxRegistration/ram:ID[@schemeID = 'VA'])

Related rules

BR-S-09The VAT amount for "standard rated" (S) (BT-117) is not taxable amount times rate
BR-S-10With "standard rated" (S) no exemption reason may be given (BT-120, BT-121)
BR-Z-01Lines, allowances or charges use the VAT category "zero rated" (Z), but the VAT breakdown (BG-23) does not …
BR-Z-03For an allowance with "zero rated" (Z), the seller's VAT number or tax number (BT-31, BT-32) is missing
BR-Z-04For a charge with "zero rated" (Z), the seller's VAT number or tax number (BT-31, BT-32) is missing
BR-Z-05For a line with "zero rated" (Z) the VAT rate is wrong: it must be 0

All validation rules

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