CZ-R-003:ISDOC format for Czech domestic
Czech domestic invoices may use ISDOC format.
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.
This is a soft validation failure. The invoice may pass initial transmission, but non-compliant values in this field can cause problems during tax audits, buyer-side processing, or downstream VAT reconciliation.
Target path: ISDOC schema compliance
Why This Error Matters
ISDOC is Czech national format.
CZ-R-003 is a soft failure. The invoice may pass initial validation, but the non-compliant field can cause issues at the receiving end — tax authorities may flag it during audits, buyer ERP systems may fail to process it, or VAT reconciliation may produce mismatches. Fixing warnings before they accumulate prevents larger compliance gaps.
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 Content
Last updated: 3 March 2026
Detect CZ-R-003 Before Submission
This error involves a financial or legal field that cannot be auto-modified. The compliance engine flags it immediately with a clear diagnosis so your team can fix it at the source.