Engine Classification
Financial or legal field · Modification blocked by policy
Reason: Hungarian invoices over HUF 100,000 must be reported to NAV (National Tax Authority) Online Invoice system in real-time. This requires API integration with NAV and cannot be done by modifying the invoice XML. Use NAV-compliant invoicing software.
What is HU-R-002?
HU-R-002 is a fatal validation rule defined in the nav specification (HUN national rules). It validates the NAV Online Invoice API 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: NAV Online Invoice API
Why This Error Matters
Hungarian law requires real-time invoice reporting.
HU-R-002 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: HU-R-002
- ·Specification: nav
How to Fix It
Check threshold
VAT > HUF 100,000?
Report to NAV
Via NAV Online Invoice API
Get reference
NAV assigns transaction ID
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Triggers validation error --> <NAV Online Invoice API></NAV Online Invoice API>
<!-- Corrected --> <NAV Online Invoice API>VALID_VALUE</NAV Online Invoice API>
Technical Reference
NAV Online Invoice APICommon Causes
- ·Not reported to NAV
- ·Reported late
Seeing this in production? The API handles HU-R-002 automatically. See the fix response →
Frequently Asked Questions
Hungarian invoices over HUF 100k must be reported to NAV.
Submit invoice data to NAV within 5 days. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.
Yes, HU-R-002 is a critical error that must be fixed.
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Last updated: 3 March 2026
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This error involves a financial field that can't be auto-modified. We'll flag it with a clear diagnosis so you can fix it at the source.