What it means
The invoice can name the seller's tax representative (BG-11), the person or company the seller has appointed to account for VAT on its behalf. EN 16931 describes its address through address lines, city, postcode, country subdivision and country, with no separate field for a room or office number. The rule fails when cac:TaxRepresentativeParty/cac:PostalAddress/cbc:Room is in the file at all, even if empty.
Why it matters
EN 16931 does not use a separate room field for the tax representative's address. A room or office number can be included in an address line if needed.
How to fix it
If you need the room or office number in the address, include it in an address line, such as the second address line (BT-65), cbc:AdditionalStreetName, for example 'Room 12'. Remove cbc:Room from cac:TaxRepresentativeParty/cac:PostalAddress and recheck the corrected file.
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 TaxRepresentativeParty PostalAddress Room 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-309 still fails, and which other rules do.
Related rules
- UBL-CR-310 Leave the separate block name field out of the tax representative's address
- UBL-CR-311 Leave the separate building name field out of the tax representative's address
- UBL-CR-312 Leave the separate building number field out of the tax representative's address
- UBL-CR-313 Leave the separate in-house mail field out of the tax representative's address
- UBL-CR-314 Leave the separate department field out of the tax representative's address
- UBL-CR-315 Leave the separate attention field out of the tax representative's address