What it means
The check searches the whole file for a listSchemeURI attribute. In UBL it can sit on a coded value, such as the payment means code (BT-81), and hold a URI identifying the scheme of its code list. One occurrence anywhere in the file is enough to trigger the warning.
Why it matters
EN 16931 asks you to omit listSchemeURI from UBL invoices and credit notes.
How to fix it
It is worth fixing when the same warning appears on all your invoices. Ask the supplier of your invoicing software to stop writing listSchemeURI. If you build the XML yourself, remove the attribute from every element that has it. Export again and recheck the 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
List scheme uri attribute should not be present 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-DT-21 still fails, and which other rules do.
Related rules
- UBL-DT-22 Leave out the languageLocaleID attribute
- UBL-DT-23 Leave out the uri attribute
- UBL-DT-24 Leave out the currencyCodeListVersionID attribute
- UBL-DT-25 Leave the characterSetCode attribute out of the invoice
- UBL-DT-26 Leave the encodingCode attribute out of the invoice
- UBL-DT-27 Leave the schemeAgencyID attribute out of the invoice