NordInvoice / EN 16931 / BT-122
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BT-122Supporting document reference
BT-122 (Supporting document reference) 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.
Identifier of a supporting document.
Browse the interactive EN 16931 mapper Check your invoice in the free validator