warningEN16931
UBL-CR-057:A UBL invoice should not include the DespatchDocumentReference Attachment
Your invoice contains DespatchDocumentReference/Attachment which is not allowed. Attachments belong in AdditionalDocumentReference.
We can fix this automatically
AUTO-FIXAuto-fix: Remove the disallowed element from the invoice XML. No data loss occurs because EN16931 explicitly prohibits this element.
No manual changes needed
Upload and Fix NowWhy This Error Matters
Invoice will be rejected by PEPPOL/EN16931 validators. Safe to remove - this element is explicitly prohibited and contains no required business data.
Common Causes
- Source ERP exports full UBL 2.1 instead of EN16931 subset
- Generic UBL template includes optional elements not needed for e-invoicing
- Conversion from another format added unsupported elements
- Manual XML editing introduced non-standard elements
- Invoice software not configured for EN16931 compliance
Frequently Asked Questions
Your invoice contains DespatchDocumentReference/Attachment which is not allowed. Attachments belong in AdditionalDocumentReference.
Your invoice contains DespatchDocumentReference/Attachment which is not allowed. Attachments belong in AdditionalDocumentReference. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
UBL-CR-057 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed.
Many instances of UBL-CR-057 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
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