SDI-00305:Codice Fiscale validation failed
Fix: Verify the Codice Fiscale format and checksum are correct. Provide the required value in the free validator.
Codice Fiscale must pass checksum validation. It should be 16 characters for individuals (alphanumeric) or 11 digits for businesses (same as Partita IVA).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Entity Type, Codice Fiscale
What is SDI-00305?
SDI-00305 is a fatal validation rule defined in the FatturaPA specification (ITA national rules).
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Why This Error Matters
SDI-00305 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Rejected by SDI (Sistema di Interscambio)
- ·Error returned: SDI-00305
- ·Specification: FatturaPA
How to Fix It
Technical Reference
Code Example
<CodiceFiscale>RSSMRA85M01H501Z</CodiceFiscale>Common Causes
- ·Typo in Codice Fiscale
- ·Invalid checksum character
- ·Wrong format used for business vs individual
Seeing this in production? The API handles SDI-00305 automatically. See the fix response →
Frequently Asked Questions
Codice Fiscale must pass checksum validation. It should be 16 characters for individuals (alphanumeric) or 11 digits for businesses (same as Partita IVA).
Verify the Codice Fiscale format and checksum are correct. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, SDI-00305 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
SDI-00305 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.
Related Content
Last updated: 3 March 2026
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