What it means
The rule checks the seller party (cac:AccountingSupplierParty/cac:Party) and fails when it holds a cac:ServiceProviderParty, a party that provides a service to the seller. EN 16931 has no such block. The invoice describes only the seller (BG-4) and the buyer (BG-7).
Why it matters
This is only a warning, so the invoice is still accepted. A service provider block is not part of the standard, so the recipient's software ignores it and does not use the details in it.
How to fix it
Remove cac:ServiceProviderParty from cac:AccountingSupplierParty/cac:Party and export again. This block is rarely entered by hand, so look at the export settings or the XML template of your invoicing software. If another company sends your invoices for you, your own details must still be in the seller fields. It is worth fixing when you build the XML yourself or want a clean result.
The rule as published
A UBL invoice should not include the AccountingSupplierParty Party ServiceProviderParty 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-195 still fails, and which other rules do.