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Italian SDI e-invoicing

SDI (Sistema di Interscambio) is Italy's mandatory e-invoicing system, operated by the Italian tax authority (Agenzia delle Entrate). Light sends and receives SDI invoices through its integration with Invopop. This article covers registering an Italian entity with SDI and routing incoming invoices to Light.

Good to know: SDI is specific to Italy. For cross-border EU e-invoicing, see the Peppol article.

Registering your entity with SDI

  1. Go to Settings (gear icon) → Entities and open your Italian entity
  2. Make sure the entity's country is set to Italy and its VAT number (Partita IVA) is filled in. A Business registration number (Codice Fiscale) is also recommended
  3. In the E-invoicing section, click Add
  4. Select the Invopop provider and the SDI network
  5. Choose a Registration type: Sending and receiving (default) or Sending only
  6. Click Next

Registration is fully automatic, with no document verification step. It shows as Processing while the registration completes, then turns Active. If it fails, the onboarding details show the reason. Fix it (for example, an invalid Partita IVA) and start the registration again by clicking Add in the entity's E-invoicing section.

Good to know: SDI does not use an EAS code or e-invoice address, so these fields stay empty on your entity. This is expected.

If you chose Sending and receiving, there is one more step: register the Codice Destinatario below so incoming invoices reach Light.

Route incoming invoices to Light (Codice Destinatario)

SDI delivers incoming invoices based on the Codice Destinatario registered with the tax authority. To receive supplier invoices in Light, register Invopop's code JKKZDGR for each Italian entity:

  1. Log in to the Agenzia delle Entrate portal with credentials for the company being registered (SPID, CIE, CNS, or Entratel)
  2. Open Fatture e Corrispettivi
  3. In the Fatturazione elettronica box, select Registrazione delle modalità di ricezione della fattura elettronica
  4. Choose the Codice Destinatario option and enter JKKZDGR
  5. Confirm with Conferma

Incoming invoices now appear in Light automatically. Until you complete this step, supplier invoices won't reach Light.

Important: Registering JKKZDGR replaces any previously registered Codice Destinatario. Complete the switch before decommissioning your old invoicing channel.

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