errorPLubl-2.1
PL-R-005:Invalid Polish NIP format
Polish NIP must be 10 digits with valid checksum.
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Upload and Answer QuestionsWhy This Error Matters
Invalid NIP prevents KSeF submission and VAT verification.
How to Fix It
1
Check length
Must be exactly 10 digits
2
Verify checksum
MOD 11 validation
Technical Details
XPath: //cac:PartyTaxScheme/cbc:CompanyIDCommon Causes
- Wrong length
- Invalid checksum
- Using old format
Frequently Asked Questions
Polish NIP must be 10 digits with valid checksum.
Use valid 10-digit NIP number. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, PL-R-005 is a critical error that will cause invoice rejection. It must be fixed before submission.
See Also
Last updated: 19 January 2026
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