IS-R-010:When EINDAGI (final due date) is provided, it must be the same as or later...
Fix: Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (IS-R-010). Upload your invoice to fix this automatically.
When EINDAGI (final due date) is provided, it must be the same as or later than the regular due date. EINDAGI cannot be before the due date.
Engine Classification
Ensure buyer reference is present for Icelandic public invoices
Confidence: 75% · Applied automatically in pipeline
What is IS-R-010?
IS-R-010 is a fatal validation rule defined in the CIUS-IS (Iceland) specification (ISL national rules). It validates the BuyerReference 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/cbc:BuyerReference
Why This Error Matters
Invoice will be rejected by Icelandic validation. EINDAGI must be >= due date.
IS-R-010 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: IS-R-010
- ·Specification: CIUS-IS (Iceland)
How to Fix It
Find the missing or empty field
Check cbc:BuyerReference at /Invoice/cbc:BuyerReference. This field is required but is either missing or empty.
Set the required value
Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (IS-R-010).
Re-validate your invoice
Upload the corrected invoice to confirm IS-R-010 is resolved.
Before / After
<Invoice> <!-- Issue: If seller is Icelandic and invoice contains supporting descr --> </Invoice>
<Invoice> <!-- Issue resolved per CIUS-IS (Iceland) --> </Invoice>
Technical Reference
/Invoice/cbc:BuyerReferenceCommon Causes
- ·EINDAGI date is before due date
- ·Dates entered in wrong order
- ·Due date changed without updating EINDAGI
- ·Data entry error on dates
- ·Date logic reversed
Seeing this in production? The API handles IS-R-010 automatically. See the fix response →
Frequently Asked Questions
When EINDAGI (final due date) is provided, it must be the same as or later than the regular due date. EINDAGI cannot be before the due date.
Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (IS-R-010). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, IS-R-010 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of IS-R-010 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
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Last updated: 14 April 2026
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