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SDI Sending

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SDI Receiving

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DeveloperInvopop
CategoryGovernment
ScopeB2B
CountryItaly
The SDI (Sistema di Interscambio) is Italy’s central hub for transmitting, validating, and delivering all electronic invoices throughout the country. It is managed by the Italian tax authority (Agenzia delle Entrate).Electronic invoicing is mandatory for all businesses in Italy. The SDI system operates using a standardized XML format called FatturaPA, which ensures all invoices contain the required information and comply with the strict validation rules established by the Italian tax authority.Invopop simplifies SDI integration by allowing you to work with GOBL format instead of XML, providing synchronous validation before submission, and offering a simple API integration with automatic handling of SDI notifications and status updates. Invopop has partnered with A-Cube to provide SDI integration services.Key Features
  • Workflow Automation: This app provides automated workflows for sending and receiving invoices through the SDI system.
  • FatturaPA XML Generation: Automatically converts GOBL documents into compliant FatturaPA XML format.
  • Real-Time Status Updates: Automatically handles SDI notifications and status updates, including delivery confirmations and acceptance/rejection notifications.
  • Bidirectional Support: Send invoices to SDI and receive invoices from suppliers through the same app.
  • Customer Registration: Register companies to receive invoices through SDI with a simple workflow step.
  • GOBL FatturaPA Integration: Uses the open-source GOBL FatturaPA library for conversions.
Make sure to check out our SDI Italy Sending Guide and SDI Italy Receiving Guide for instructions on how to issue and receive invoices.

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FAQ

Invoicing questions
Install the SDI Italy app for B2B/B2G/B2C structured invoicing, or the Smart Receipts app for B2C-only AdE CF receipts. Run invoices through the Generate FatturaPA + Send to SDI workflow.
See the Italy tax regime in GOBL for tax categories, codice fiscale rules, and SDI-specific extensions. The it-sdi-v1 addon documents required FatturaPA fields.
The SDI system can take up to 24 hours to process invoices, especially during peak periods. While waiting, the “Send to SDI” step will remain in the QUEUED state. The system will automatically check for updates, and the status will change once SDI has processed the invoice.
Once the SDI process is complete, the workflow will show one of several status codes:
  • delivered - The invoice was successfully delivered to a B2B recipient
  • accepted-pa - The invoice was accepted by a Public Administration
  • not-delivered - The invoice couldn’t be delivered, but was processed correctly by SDI
Check the workflow history to see the exact status.
No, sending and receiving invoices require different workflows:
  • For sending invoices, a workflow with the Generate FatturaPA and Send to SDI steps is needed
  • For receiving invoices, two workflows are required:
    1. A Customer Registration workflow (run once for each company that needs to receive invoices)
    2. An Import Invoices workflow (configured to run automatically)
For more information on receiving invoices, see our Italy - SDI: Receiving Invoices guide.
Invopop handles both Italian tax identification numbers in the supplier and customer sections of invoices:
  • Partita IVA (VAT number): Automatically extracted from the tax_id/code field.
  • Codice Fiscale (fiscal code): Must be specified as an identity with the key it-fiscal-code.
Here’s an example showing both identifiers in a supplier object:
Supplier with Partita IVA and Codice Fiscale
{
    "supplier": {
        "name": "MªF. Services",
        "tax_id": {
            "country": "IT",
            "code": "12345678903"
        },
        "identities": [
            {
                "key": "it-fiscal-code",
                "code": "MRTMTT91D08F205J"
            }
        ],
    }
}
For more information on receiving invoices, see our Italy - SDI: Receiving Invoices guide.
Registering supplier questions
Provide the supplier’s Partita IVA and Codice Fiscale (where different) in their party configuration. No certificate upload is needed — Invopop signs and submits to SDI as the supplier’s intermediary.
No supplier certificates are required. Invopop signs FatturaPA submissions with its own Agenzia delle Entrate-recognized intermediary credentials. Only the Partita IVA and routing metadata are stored.
Just configure the supplier’s Partita IVA in their party. SDI does not require explicit supplier registration to issue — Invopop signs and submits as intermediary the moment the workflow runs.
None — Invopop submits via its intermediary credentials (a server-to-server channel with Agenzia delle Entrate). Suppliers don’t manage any certificates for SDI.
Receiving questions
Register the recipient with SDI using Invopop’s Recipient Code (JKKZDGR) and run the Customer Registration workflow. Invopop automatically receives matching invoices and routes them through the configured Import workflow.
Inbound FatturaPA XMLs are parsed via gobl.fatturapa. The original signed XML is preserved as a silo entry attachment alongside the GOBL representation.
If an invoice received through SDI contains errors:
  1. The import process will still attempt to convert it to GOBL format
  2. Any validation errors will be logged, and the rescue steps in your workflow will be triggered
  3. You can review the errors and decide how to handle the invoice
If the invoice has significant structural issues that prevent conversion, you may need to contact the sender to request a corrected invoice.
Invoices are typically received within minutes after being sent by suppliers through SDI. The automatic import process in Invopop processes them as soon as they are received by our system.
Yes, multiple companies can be registered to receive invoices through a single Invopop workspace. For each company, you must:
  1. Register the Recipient Code JKKZDGR with the Italian tax authority for that specific company
  2. Have its tax ID registered using the Customer Registration workflow in Invopop
  3. Use the same Import Invoices workflow configured in the app settings
This two-step registration process (with the tax authority and with Invopop) must be completed for each company you want to register. This is particularly useful for white-labeling scenarios where a user manages multiple entities.
The two-step registration process serves different purposes:
  1. Registering with the Italian tax authority - Tells SDI to route invoices addressed to your company to Invopop’s system using the Codice Destinatario JKKZDGR.
  2. Registering with Invopop (Customer Registration workflow) - Tells Invopop’s system which invoices to accept and process for your workspace.
Both steps are necessary: the first routes the invoices to Invopop, and the second ensures Invopop knows which workspace should receive those invoices.
Signed FatturaPA XML (versions 1.2.x), conforming to the Agenzia delle Entrate schema. The signature is XAdES; SDI’s own Notifica di Esito Committente envelopes the document during transmission.
More answers in our Italy FAQ section

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