What it means
In a UBL invoice or credit note, the seller (BG-4) is described under cac:AccountingSupplierParty/cac:Party. This rule checks that this block has no cac:Language, which would state the language the seller works in. EN 16931 has no field for it.
Why it matters
EN 16931's UBL rules do not use a separate language element in the seller's party details.
How to fix it
Check your invoicing software for a language setting that is exported with the company details and switch that export off, then export again. If you build the XML yourself, delete cac:Language from cac:AccountingSupplierParty/cac:Party. Check the corrected file again.
Once the file is corrected, check it again for free: Validate an invoice against EN 16931
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice
The rule as published
A UBL invoice should not include the AccountingSupplierParty Party Language Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (UBL) | 1.3.17 |
| EN 16931 (UBL credit note) | 1.3.17 |
| XRechnung 3.0 (UBL) | 3.0.2 |
| XRechnung 3.0 (UBL credit note) | 3.0.2 |
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
| SI-UBL 2.0 / NLCIUS (invoice) | 2.0.3.13 |
| SI-UBL 2.0 / NLCIUS (credit note) | 2.0.3.13 |
| France CTC (UBL invoice) | 1.4.0-04 |
| France CTC (UBL credit note) | 1.4.0-04 |
| CIUS-RO UBL Invoice 1.0.9 | 1.0.9 |
| CIUS-RO UBL Credit Note 1.0.9 | 1.0.9 |
Check your file
Drop your e-invoice to see whether UBL-CR-146 still fails, and which other rules do.
Related rules
- UBL-CR-147 Do not include an ID in the seller's address
- UBL-CR-148 Do not include an address type code in the seller's address
- UBL-CR-149 Do not include an address format code in the seller's address
- UBL-CR-150 Do not include a PO box element in the seller's address
- UBL-CR-151 Do not include a floor element in the seller's address
- UBL-CR-152 Do not include a room element in the seller's address