What it means
A UBL invoice or credit note names a contract in cac:ContractDocumentReference. EN 16931 only uses the contract number from that block (BT-12, in cbc:ID). This rule checks that the block does not also contain a verification result (cac:ResultOfVerification), which would record the outcome of a check made on the contract document, for example a signature check.
Why it matters
EN 16931 recommends leaving verification results out of the contract reference.
How to fix it
Ask the supplier of your invoicing software to stop exporting cac:ResultOfVerification in the contract reference. If you build the XML yourself, delete cac:ResultOfVerification from cac:ContractDocumentReference. 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 ContractDocumentReference ResultOfVerification 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-109 still fails, and which other rules do.
Related rules
- UBL-CR-110 Leave the copy indicator out of additional document references
- UBL-CR-111 Leave the UUID out of additional document references
- UBL-CR-112 Leave the issue date out of additional document references
- UBL-CR-113 Leave the issue time out of additional document references
- UBL-CR-114 Leave the document type text out of additional document references
- UBL-CR-115 Leave the XPath out of additional document references