BR-11 — Missing Buyer country code
What it means
The Buyer country code is missing (e.g. LV). Just like for the seller, the country code states which country the buyer is registered in and affects VAT calculation rules.
How to fix it
Check that the buyer's PostalAddress section has a Country block with
an IdentificationCode (ISO 3166-1 alpha-2, e.g. LV).
Example
Wrong: PostalAddress without a Country block.
Correct: <cac:Country><cbc:IdentificationCode>LV</cbc:IdentificationCode></cac:Country>.