`BR-IP-04`

EN 16931 · validation rule

EN 16931Error

The invoice has a document level charge (BT-102) with VAT category M (IPSI) but does not identify the taxable parties: it must contain a seller VAT identifier (BT-31), seller tax registration identifier (BT-32) or seller tax representative VAT identifier (BT-63). Fill cac:PartyTaxScheme/cbc:CompanyID / ram:SpecifiedTaxRegistration/ram:ID accordingly.

Field: seller.vat_id (BT-31)
Rule set: EN 16931
Rule-set version: EN 16931 validation artefacts 1.3.17 · in force since 2026-10-13 · 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.

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-IP-04?lang=en