Glossary Term

SDI (Sistema di Interscambio)

SDI is Italy's central government platform that receives, validates, and routes all electronic invoices for both B2B and B2G transactions.

Quick Facts

country
Italy
operator
Agenzia delle Entrate
full name
Sistema di Interscambio
mandatory since
2019

Definition

What is SDI?

SDI (Sistema di Interscambio) is Italy's central e-invoice hub operated by the Agenzia delle Entrate (Revenue Agency). Since 2019, ALL invoices in Italy must pass through SDI — both B2B and B2G.

How SDI Works

1. Submission: Seller sends FatturaPA XML to SDI
2. Validation: SDI checks format and data
3. Routing: SDI forwards to recipient via Codice Destinatario or PEC
4. Confirmation: SDI sends delivery receipt back to seller

Access Methods

  • Direct connection (for large volumes)

  • Intermediary services (most common)

  • Web portal (for occasional use)

  • PEC email

    • Key Identifiers

  • Codice Destinatario: 7-character routing code

  • PEC: Certified email address (alternative to Codice Destinatario)

    • Error Handling

    SDI validates invoices strictly. Common rejection reasons:

  • Invalid Codice Destinatario

  • Duplicate invoice number

  • Invalid Partita IVA/Codice Fiscale

  • Schema validation failures