Counterfoil rule note
Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.
CompanyID (VAT Identifier) must be stated when providing the PartyTaxScheme/TaxScheme/ID.
Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-SR-53/
Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL
Severity note: fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.
The company identifier must be stated when a party tax scheme identifier is present. The statement ends with a period and says must. It does not say shall. It is 89 characters. The flag is fatal. The context is a party tax scheme. The published test calls exists for the tax scheme identifier and for the company identifier. It does not call count and it does not use <=.
Send the company identifier when the tax scheme identifier is present.
Illustration of the condition in the official statement. Not an example published by the source.
Fails the stated condition. A party tax scheme names a tax scheme identifier and omits the company identifier.
Passes the stated condition. A party tax scheme names both a tax scheme identifier and a company identifier.
Copied from the source. Not reimplemented on this page.
cac:PartyTaxScheme
exists(cac:TaxScheme/cbc:ID) and exists(cbc:CompanyID)
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