`BR-CL-08`

EN 16931 · validation rule

EN 16931Error

The invoice note subject code (BT-21) is not from UNTDID 4451. In UBL the code is written as the prefix '#CODE#' inside cbc:Note (e.g. '#AAI#Text'); in CII it is ram:IncludedNote/ram:SubjectCode. Use a valid 4451 code such as AAI (general information) or REG (regulatory information).

Field: document.notes (BT-21)
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-CL-08?lang=en