BT-21

Invoice note subject code

BT-21 (Invoice note subject code) is a business term of EN 16931, the European e-invoicing standard. This page shows where the field lives in a UBL invoice, how often it may appear and which validation rules check it.

Qualifier for the note (UNCL4451).

Group: BG-1 (Invoice note)

Cardinality: 0..1

UBL element: cbc:Note (prefix #code#)

Example value: AAI

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