Critical
BR-DE-1
Seller VAT ID Missing (BT-31)
What This Error Means
The seller's VAT identification number (Umsatzsteuer-Identifikationsnummer) must be provided in Business Term BT-31. This is mandatory for all German invoices above the small business threshold (Kleinunternehmerregelung).
How to Fix It
Add the seller's VAT ID in the format 'DE123456789' to the cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID element.
Fix this automatically
Upload your invoice to our Smart Repair engine. It will detect and fix BR-DE-1 errors automatically with a GoBD audit trail.
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