BR-09: The seller country code is missing
This code shows up when an electronic invoice is validated. Here is what it means, why it fires, and what to change in the file.
Why this code appears
The seller address carries no country code (BT-40). It determines which VAT regime applies to the transaction.
How to fix it
Fill PostalTradeAddress/CountryID with a two-letter ISO 3166-1 code: FR, DE.
Where it happens
This code comes from EN 16931, the European e-invoicing standard. It concerns business term BT-40.