BR-06 — Missing Seller name
What it means
The Seller name is missing. The invoice must state the legal name of the company issuing it — without it the buyer's system can't automatically identify the other party to the transaction.
How to fix it
Check that the AccountingSupplierParty section of the invoice XML has the
name field filled in (RegistrationName or PartyName). This often goes
missing when the company profile in accounting software (Jumis, Horizon,
1C, etc.) isn't fully filled in, or the wrong export template is used.
Example
Wrong: the seller section has no name field at all.
Correct: <cac:PartyLegalEntity><cbc:RegistrationName>SIA Piemērs</cbc:RegistrationName></cac:PartyLegalEntity>.