CZ-R-001:Czech DIČ required
Fix: Add CZ + DIČ number. Provide the required value in the free validator.
Czech invoices must include DIČ (tax identification number).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Czech Tax ID (DIČ)
What is CZ-R-001?
CZ-R-001 is a fatal validation rule defined in the ubl-2.1 specification (CZE national rules). It validates the CompanyID element under PartyTaxScheme in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: XPath: //cac:PartyTaxScheme/cbc:CompanyID
Why This Error Matters
Czech tax identification required.
CZ-R-001 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Fails UBL schema validation
- ·Error returned: CZ-R-001
- ·Specification: ubl-2.1
How to Fix It
Get DIČ
Czech tax ID (8-10 digits)
Add to invoice
CZ prefix + number
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Missing or empty element triggers cbc:CompanyID error --> <cbc:CompanyID></cbc:CompanyID>
<!-- Provide the required value --> <cbc:CompanyID>VALID_VALUE</cbc:CompanyID>
Technical Reference
XPath: //cac:PartyTaxScheme/cbc:CompanyIDCommon Causes
- ·Missing DIČ
- ·Wrong format
Seeing this in production? The API handles CZ-R-001 automatically. See the fix response →
Frequently Asked Questions
Czech invoices must include DIČ (tax identification number).
Add CZ + DIČ number. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, CZ-R-001 is a critical error that must be fixed.
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Last updated: 3 March 2026
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