warningEN16931
UBL-DT-20:List uri attribute should not be present
Your invoice contains the listURI attribute on a code element. This attribute is not allowed in EN16931 and must be removed.
We can fix this automatically
AUTO-FIXAuto-fix: Remove the prohibited attribute from the element. No data loss - EN16931 does not use this attribute.
No manual changes needed
Upload and Fix NowWhy This Error Matters
Invoice will be rejected by PEPPOL/EN16931 validators. These attributes are explicitly prohibited and provide no value in e-invoicing.
Common Causes
- Source ERP exports full UBL 2.1 attributes instead of EN16931 restricted subset
- Generic UBL template includes optional datatype attributes not needed for e-invoicing
- XML generation library adds default attributes to all elements
- Conversion from another invoice format added non-standard attributes
- Manual XML editing introduced attributes not supported in EN16931
Frequently Asked Questions
Your invoice contains the listURI attribute on a code element. This attribute is not allowed in EN16931 and must be removed.
Your invoice contains the listURI attribute on a code element. This attribute is not allowed in EN16931 and must be removed. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
UBL-DT-20 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed.
Many instances of UBL-DT-20 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues.
See Also
Last updated: 16 January 2026
Share this guide: