`BR-DE-16`

XRechnung (KoSIT) · validation rule

XRechnung (KoSIT)Error

A VAT category S, Z, E, AE, K, G, L or M is used, so XRechnung requires at least one of seller VAT identifier (BT-31), seller tax registration identifier (BT-32) or a seller tax representative (BG-11). The sender must add the VAT id (cac:PartyTaxScheme/cbc:CompanyID with TaxScheme VAT / ram:SpecifiedTaxRegistration/ram:ID[@schemeID='VA']) or the tax number (schemeID 'FC').

Field: seller.vat_id (BT-31) / seller.tax_registration_id (BT-32)
Rule set: XRechnung (KoSIT)
Rule-set version: XRechnung 3.0.2 Schematron 2.6.0 · in force since 2026-10-17 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Worked example · UBL

With VAT category S on the lines, the seller must give a VAT id (BT-31, TaxScheme VAT) or a tax number (BT-32, TaxScheme FC).

Fails this rule

<!-- seller cac:Party has no cac:PartyTaxScheme: neither VAT id (BT-31) nor tax number (BT-32) -->

Passes

<cac:PartyTaxScheme>
  <cbc:CompanyID>DE123456789</cbc:CompanyID>
  <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
</cac:PartyTaxScheme>

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/BR-DE-16?lang=en