SDI-00305:Codice Fiscale validation failed
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). It checks whether codice fiscale validation failed.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Why This Error Matters
SDI-00305 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
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
Resolve SDI-00305 with Guided Input
The compliance engine detects this error and prompts for the required business data before applying a safe, auditable fix.