UBL-SR-24:Deliver to information shall occur maximum once
Fix: Your invoice contains multiple Delivery location elements. EN16931 allows only one Delivery element per invoice.
Your invoice contains multiple Delivery location elements. EN16931 allows only one Delivery element per invoice.
Engine Classification
Requires user confirmation before application
What is UBL-SR-24?
UBL-SR-24 is a fatal validation rule defined in the EN16931 specification. It validates the Delivery element in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: /Invoice/cac:Delivery
Why This Error Matters
Invoice will be rejected by EN16931 validators. These structural constraints ensure consistent processing by receiving systems.
UBL-SR-24 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Fails EN 16931 business rule validation
- ·Error returned: UBL-SR-24
- ·Specification: EN16931
How to Fix It
Locate the duplicate entries
Search for multiple cac:Delivery elements at /Invoice/cac:Delivery. Only one instance is allowed per the specification.
Remove the duplicates
Your invoice contains multiple Delivery location elements. EN16931 allows only one Delivery element per invoice.
Re-validate your invoice
Upload the corrected invoice to confirm UBL-SR-24 is resolved.
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Required block is missing --> <!-- <cac:Delivery> ... </cac:Delivery> -->
<!-- Add the required block --> <cac:Delivery> <!-- child elements --> </cac:Delivery>
Technical Reference
/Invoice/cac:DeliveryCommon Causes
- ·ERP system exports multiple references where only one is allowed in EN16931
- ·Data consolidation merged records that should have been deduplicated
- ·Template or mapping incorrectly configured to output duplicate elements
- ·Manual editing introduced extra elements
- ·Invoice conversion from another format did not merge duplicate entries
Seeing this in production? The API handles UBL-SR-24 automatically. See the fix response →
Frequently Asked Questions
Your invoice contains multiple Delivery location elements. EN16931 allows only one Delivery element per invoice.
Your invoice contains multiple Delivery location elements. EN16931 allows only one Delivery element per invoice. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, UBL-SR-24 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of UBL-SR-24 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
Related Content
Last updated: 14 April 2026
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