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PEPPOL-COMMON-R045:Tax Code (Codice Fiscale) must be stated in the correct format

Italian Tax Code (Codice Fiscale) must follow the correct format. For individuals, this is a 16-character alphanumeric code; for companies, it may be an 11-digit VAT number.

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Why This Error Matters

Invoice will be rejected by Italian validation. Valid Codice Fiscale is required for tax reporting and identification.

Common Causes

  • Tax code has wrong length
  • Invalid characters in tax code
  • Check character is incorrect
  • Format mixing personal and company styles
  • Typo in codice fiscale

Frequently Asked Questions

Italian Tax Code (Codice Fiscale) must follow the correct format. For individuals, this is a 16-character alphanumeric code; for companies, it may be an 11-digit VAT number.
Italian Tax Code (Codice Fiscale) must follow the correct format. For individuals, this is a 16-character alphanumeric code; for companies, it may be an 11-digit VAT number. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
PEPPOL-COMMON-R045 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed.
Many instances of PEPPOL-COMMON-R045 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues.

Last updated: 16 January 2026

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