What it means
In EN 16931 the tax representative has a name (BT-62) and a VAT number (BT-63). In UBL the name sits in cac:PartyName and the VAT number in cac:PartyTaxScheme/cbc:CompanyID. The rule flags a cbc:RegistrationName inside cac:PartyTaxScheme, a registration name that EN 16931 has no field for. It applies to invoices and credit notes.
Why it matters
EN 16931 does not use a registration name within the tax representative's tax details.
How to fix it
Check that the tax representative's name and VAT number are filled in under their own fields in your invoicing software. In the XML, remove cbc:RegistrationName from cac:TaxRepresentativeParty/cac:PartyTaxScheme and keep cbc:CompanyID. The tax representative's name belongs in cac:TaxRepresentativeParty/cac:PartyName/cbc:Name. Recheck the exported 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 PartyTaxScheme RegistrationName 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-326 still fails, and which other rules do.
Related rules
- UBL-CR-327 No tax level code for the tax representative
- UBL-CR-328 No exemption reason code for the tax representative
- UBL-CR-329 No exemption reason text for the tax representative
- UBL-CR-330 No registration address in the tax representative's tax details
- UBL-CR-331 No tax scheme name for the tax representative
- UBL-CR-332 No tax type code in the tax representative's tax scheme