BR-05
EN 16931
FATAL
Every invoice must state its currency (BT-5, cbc:DocumentCurrencyCode) as an ISO 4217 code such as EUR.
How to fix it
- Add
cbc:DocumentCurrencyCode, e.g.EUR. - Uppercase, three letters -
euror€fail the code list check. - All BT-131/BT-106..115 amounts are implicitly in this currency (except the VAT-in-accounting-currency total, BT-111).
Official rule text
An Invoice shall have an Invoice currency code (BT-5).
Developers also reach this page searching for an “invoice validation error”, an “e-invoice rejected” message, or how to fix a failed EN 16931 compliance check — it's the same issue, explained above.
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