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Warning

UBL-CR-115: Leave the XPath out of additional document references

In short

Warning: worth checking.

UBL-CR-115 means an additional document reference in your UBL invoice or credit note carries an XPath (cbc:XPath), which EN 16931 does not use. Delete that element from cac:AdditionalDocumentReference and keep the other details.

On this page

What it means

This rule checks that no cac:AdditionalDocumentReference in a UBL invoice or credit note contains an XPath expression in cbc:XPath. It applies to all additional document references, including supporting documents (BG-24).

Why it matters

EN 16931 recommends leaving XPath expressions out of additional document references.

How to fix it

Ask the supplier of your invoicing software to stop exporting cbc:XPath in additional document references. If you build the XML yourself, delete cbc:XPath from cac:AdditionalDocumentReference. 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 AdditionalDocumentReference Xpath

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
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether UBL-CR-115 still fails, and which other rules do.

Updated 6 November 2026