Engine Classification
Financial or legal field · Modification blocked by policy
Reason: Czech domestic invoices may need to use ISDOC format instead of UBL/CII. This requires format conversion or generating the invoice in ISDOC format from your source system.
What is CZ-R-003?
CZ-R-003 is a warning validation rule defined in the isdoc specification (CZE national rules). It validates the ISDOC schema compliance element in the UBL invoice XML.
The invoice may pass transmission, but this non-compliance can cause problems during tax audits or buyer-side processing.
Target path: ISDOC schema compliance
Why This Error Matters
ISDOC is Czech national format.
CZ-R-003 is a soft failure that can cause issues at the receiving end — tax audits, ERP processing, or VAT reconciliation mismatches.
Validator Behavior
- ·Generates validation warning
- ·Error returned: CZ-R-003
- ·Specification: isdoc
How to Fix It
Check recipient
Do they prefer ISDOC?
Convert if needed
Transform to ISDOC format
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Triggers validation error --> <ISDOC schema compliance></ISDOC schema compliance>
<!-- Corrected --> <ISDOC schema compliance>VALID_VALUE</ISDOC schema compliance>
Technical Reference
ISDOC schema complianceCommon Causes
- ·Using international format only
Seeing this in production? The API handles CZ-R-003 automatically. See the fix response →
Frequently Asked Questions
Czech domestic invoices may use ISDOC format.
Consider ISDOC for Czech-to-Czech invoicing. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.
CZ-R-003 is a warning that should be addressed.
Related Errors
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Last updated: 3 March 2026
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