BT-21

Invoice note subject code

Raw

Qualifies what the free-text note (BT-22) is about (UNTDID 4451). UBL has no dedicated element — the code is embedded as a #CODE# prefix inside cbc:Note.

Where does it live in the XML?

UBL (XRechnung)
cbc:Note (Präfix #CODE#)
CII (XRechnung, ZUGFeRD, Factur-X)
rsm:ExchangedDocument/ram:IncludedNote/ram:SubjectCode

Part of BG-1 Invoice note

Validate your invoice for free

The Billhorse validator checks XRechnung, ZUGFeRD and Factur-X right in your browser — your file is never uploaded.

Open the validator

← All EN 16931 terms
Semantics: EN 16931-1. Simplified explanation in our own words — the norm is authoritative.