How do I fix IS-R-008?

Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (IS-R-008). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Is IS-R-008 a critical error?

Yes, IS-R-008 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can IS-R-008 be automatically fixed?

Many instances of IS-R-008 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

errorISLCIUS-IS (Iceland)

`IS-R-008`:When Icelandic invoices include EINDAGI (final due date) in supporting...

When Icelandic invoices include EINDAGI (final due date) in supporting documents, the date must be in YYYY-MM-DD format.

Severity

Fatal

Rule set

CIUS-IS (Iceland)

Country

ISL

Fix type

AUTO-FIX

Confidence

80%

Engine Classification

Ensure accounting cost is present for Icelandic invoice lines

Confidence: 80% · Applied automatically in pipeline

What is IS-R-008?

IS-R-008 is a fatal validation rule defined in the CIUS-IS (Iceland) specification (ISL national rules). It validates the AccountingCost element in the UBL invoice XML.

When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.

Target path: //cac:InvoiceLine/cbc:AccountingCost

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Why This Error Matters

Invoice will be rejected by Icelandic validation. EINDAGI date must use ISO date format.

IS-R-008 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.

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-008
·Specification: CIUS-IS (Iceland)

Before / After

Failing XML

<Invoice>
  <!-- Issue: If seller is Icelandic and invoice contains supporting descr -->
</Invoice>

Corrected XML

<Invoice>
  <!-- Issue resolved per CIUS-IS (Iceland) -->
</Invoice>

Technical Reference

XPath//cac:InvoiceLine/cbc:AccountingCost

SpecCIUS-IS (Iceland)

Operationset_default

StrategyEnsure accounting cost is present for Icelandic invoice lines

Common Causes

·EINDAGI date in wrong format
·Date format DD-MM-YYYY used instead
·Icelandic date format used instead of ISO
·Date formatting error in export
·Manual entry with wrong format

Seeing this in production? The API handles IS-R-008 automatically. See the fix response →

Related Errors

IS-R-002

Icelandic suppliers must provide their Icelandic legal ID (kennitala). This...

IS-R-003

Icelandic suppliers must provide complete address with street name and...

IS-R-004

When both seller and buyer are Icelandic, the buyer's kennitala must be...

Last updated: 27 February 2026

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Handle IS-R-008 Automatically in Your Pipeline

The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.

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IS-R-008:When Icelandic invoices include EINDAGI (final due date) in supporting...