`BR-CO-09`

EN 16931 · validation rule

EN 16931Error

A VAT identifier (seller BT-31, tax representative BT-63 or buyer BT-48) does not start with the ISO 3166-1 alpha-2 country prefix (e.g. DE123456789; Greece may use EL). The sender must prefix the VAT id with the country code and remove spaces or other separators.

Field: seller.vat_id (BT-31) / buyer.vat_id (BT-48) / seller_tax_representative.vat_id (BT-63)
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-CO-09?lang=en