UBL-DT-23:Uri attribute should not be present
Your invoice contains the uri attribute on an element. This attribute is not allowed in EN16931 and must be removed.
Engine Classification
Financial or legal field · Modification blocked by policy
What is UBL-DT-23?
UBL-DT-23 is a warning validation rule defined in the EN16931 specification. It checks whether uri attribute should not be present.
This is a soft validation failure. The invoice may pass initial transmission, but non-compliant values in this field can cause problems during tax audits, buyer-side processing, or downstream VAT reconciliation.
Why This Error Matters
Invoice will be rejected by PEPPOL/EN16931 validators. These attributes are explicitly prohibited and provide no value in e-invoicing.
UBL-DT-23 is a soft failure. The invoice may pass initial validation, but the non-compliant field can cause issues at the receiving end — tax authorities may flag it during audits, buyer ERP systems may fail to process it, or VAT reconciliation may produce mismatches. Fixing warnings before they accumulate prevents larger compliance gaps.
Validator Behavior
- ·Generates validation warning
- ·Fails EN 16931 business rule validation
- ·Error returned: UBL-DT-23
- ·Specification: EN16931
Technical Reference
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
Seeing this in production? The API handles UBL-DT-23 automatically. See the fix response →
See Also
Last updated: 18 February 2026
Handle UBL-DT-23 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.