> ## Documentation Index
> Fetch the complete documentation index at: https://docs.invopop.com/llms.txt
> Use this file to discover all available pages before exploring further.
# SDI Sending Invoices Guide
> Generate and issue electronic invoices through Italy's SDI system
## Introduction
Electronic invoicing is mandatory for all businesses in Italy. The *Sistema di Interscambio* (SDI) serves as the Italian government's central hub for transmitting, validating, and delivering all electronic invoices throughout the country.
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 (*Agenzia delle Entrate*). To ensure proper routing of invoices to the correct recipient, the SDI system uses a unique identifier called a Recipient Code, which is assigned to each registered SDI provider.
Invopop simplifies SDI integration by allowing you to work with [GOBL](https://docs.gobl.org) format instead of XML, providing synchronous validation before submission, and offering a simple API integration with automatic handling of SDI notifications and status updates. For receiving invoices through SDI, see our companion guide: [Italy - SDI: Receiving Invoices](/guides/countries/it-sdi-receiving).
| - | Sandbox | Live |
| ----------------- | ----------------------------------------- | ------------------ |
| **Responses** | Simulated by A-Cube (no real SDI sandbox) | Real SDI responses |
| **Configuration** | Simulated response type must be set | — |
## Setup
1. Navigate to **Configuration** → **Apps**
2. Locate **SDI Italy** in the app discovery list
3. Tap **Connect** to activate
The initial connection requires no configuration for sending invoices.
SDI does not have a sandbox environment. When `sandbox` mode is selected, Invopop's third-party submission service, [A-Cube](https://www.acubeapi.com), simulates a response from SDI.
Signs and converts the [GOBL](https://docs.gobl.org) document into the FatturaPA XML format and then sends it to SDI.
Copy and paste into a new [Empty Invoice workflow](https://console.invopop.com/redirect/workflows/new?template=empty-invoice) code view.
```json Example SDI issue invoice workflow theme={"system"}
{
"name": "SDI issue invoice",
"description": "Issue an invoice through SDI",
"schema": "bill/invoice",
"steps": [
{
"id": "1a692ae0-cd12-11ef-998c-e97f18c9212e",
"name": "Set state",
"provider": "silo.state",
"summary": "Set state to `processing`{.state .processing}",
"config": {
"state": "processing"
}
},
{
"id": "1855b430-cd12-11ef-998c-e97f18c9212e",
"name": "Sign envelope",
"provider": "silo.close"
},
{
"id": "2042f860-cd12-11ef-998c-e97f18c9212e",
"name": "Send invoice to SDI",
"provider": "sdi-it.send",
"summary": "Sandbox · Accepted by PA (Notifica esito)",
"config": {
"environment": "sandbox",
"response": "NE"
}
},
{
"id": "236965b0-cd12-11ef-998c-e97f18c9212e",
"name": "Generate PDF",
"provider": "pdf",
"summary": "Italian · A4",
"config": {
"date_format": "%Y-%m-%d",
"locale": "it",
"logo_height": 40
}
},
{
"id": "2b6db450-cd12-11ef-998c-e97f18c9212e",
"name": "Set state",
"provider": "silo.state",
"summary": "Set state to `sent`{.state .sent}",
"config": {
"state": "sent"
}
}
],
"rescue": [
{
"id": "2d5d7660-cd12-11ef-998c-e97f18c9212e",
"name": "Set state",
"provider": "silo.state",
"summary": "Set state to `error`{.state .error}",
"config": {
"state": "error"
}
}
]
}
```
Before starting, review the [workflows guide](/guides/features/workflows) to understand the general setup process.
In [Console](https://console.invopop.com), create a new workflow and choose [Empty Invoice workflow](https://console.invopop.com/redirect/workflows/new?template=empty-invoice) as the base. Then add the following steps:
1. **Set state** - To `Processing`.
2. **Sign envelope** - Signs the [GOBL](https://docs.gobl.org) document preventing further modifications.
3. **Send invoice to SDI** - Generates the FatturaPA XML and sends it to SDI. Upon success, the XML file is attached to the invoice entry. If `sandbox` is chosen as the environment, the simulated response from SDI must be set.
4. **Set state** - To `Sent`.
In the **Error Handling** section, add a **Set state** step with the state set to `Error` to capture and flag failed imports.
This is the minimal workflow with state handling required to automate the reception and visualization of invoices received through SDI. You may expand it with additional steps such as storing a backup copy, notifying clients, or integrating the documents into an ERP system.
## Sending Invoices
Invopop uses the [GOBL FatturaPA](https://github.com/invopop/gobl.fatturapa) library to process conversions. When creating invoices for SDI, you need to:
1. Set the `regime` field to `IT` in your GOBL invoice
2. Add the [`it-sdi-v1`](https://docs.gobl.org/addons/it-sdi-v1) addon to enable Italian-specific validations and extensions
Detailed information about the SDI-specific extensions and validations can be found in:
* [Italy SDI FatturaPA v1.x Addon Documentation](https://docs.gobl.org/addons/it-sdi-v1)
* [Italy Tax Regime Documentation](https://docs.gobl.org/regimes/it)
Example invoices are provided below, or you can use the [GOBL Builder](https://build.gobl.org) to create custom invoices.
### How the Send step works
This step generates the FatturaPA XML and sends it to SDI through our integration partner. Upon successful completion, the XML file is attached to the invoice entry. The SDI service usually responds within seconds but may take up to 24 hours. While waiting, this step remains in a `Queued` state.
When the Send step completes, it returns one of three results:
* `OK` if successful
* `KO` for unrecoverable errors
* `SKIP` if the invoice was already sent
## Example Invoices
In this example, we're issuing a standard B2C invoice from an Italian supplier to a consumer.
Notice:
* `"$tags": ["b2g"]` scenario will set the `it-sdi-format` to FPA12 (vs. FPR12 default for private parties) and the document type to TD01.
* The recipient Codice Univoco for PA goes in customer.inboxes with key `it-sdi-code`.
* The customer tax\_id for a PA entity is the Codice Fiscale (11 digits for the example *Comune di Roma*).
* RF01 ordinary fiscal regime on the supplier, required by FatturaPA.
* Example has CIG/CUP codes for public tender or funded project (not required otherwise.
```json SDI B2C Invoice theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"series": "FT",
"code": "020",
"issue_date": "2024-07-12",
"currency": "EUR",
"tax": {
"prices_include": "VAT"
},
"supplier": {
"name": "Company Name S.r.l.",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Customer Name S.r.l.",
"tax_id": {
"country": "IT"
},
"identities": [
{
"key": "it-fiscal-code",
"code": "RSSGNN60R30H501U"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"quantity": "1",
"item": {
"name": "Cleaning services",
"price": "125.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "standard"
}
]
}
]
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"type": "standard",
"series": "FT",
"code": "020",
"issue_date": "2024-07-12",
"currency": "EUR",
"tax": {
"prices_include": "VAT",
"ext": {
"it-sdi-document-type": "TD01",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "Company Name S.r.l.",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Customer Name S.r.l.",
"tax_id": {
"country": "IT"
},
"identities": [
{
"key": "it-fiscal-code",
"code": "RSSGNN60R30H501U"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"i": 1,
"quantity": "1",
"item": {
"name": "Cleaning services",
"price": "125.00"
},
"sum": "125.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "general",
"percent": "22.0%"
}
],
"total": "125.00"
}
],
"totals": {
"sum": "125.00",
"tax_included": "22.54",
"total": "102.46",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "standard",
"base": "102.46",
"percent": "22.0%",
"amount": "22.54"
}
],
"amount": "22.54"
}
],
"sum": "22.54"
},
"tax": "22.54",
"total_with_tax": "125.00",
"payable": "125.00"
}
}
```
In this example, we're issuing a standard B2B invoice from an Italian supplier to another Italian business customer.
Notice:
* both supplier and customer have their Partita IVA (VAT number) and Codice Fiscale properly specified,
* the minimal version contains only essential fields; `gobl build` handles all calculations,
* when running `gobl build`, the system automatically calculates totals, applies IVA rates, and normalizes the document according to SDI requirements,
* the built version shows all calculated fields including tax breakdowns, line totals, payment terms, and final amounts,
* the [`it-sdi-v1`](https://docs.gobl.org/addons/it-sdi-v1) addon validates the document structure for B2B transactions, and,
* the invoice will be transmitted through the SDI system and delivered to the customer's designated channel.
```json SDI B2B Invoice theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"series": "SAMPLE",
"code": "002",
"issue_date": "2023-05-21",
"currency": "EUR",
"tax": {
"prices_include": "VAT"
},
"supplier": {
"name": "Hotel California",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Mela S.r.l.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"quantity": "1",
"item": {
"name": "Tassa di Soggiorno",
"price": "1.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "exempt",
"ext": {
"it-sdi-exempt": "N4"
}
}
]
},
{
"quantity": "1",
"item": {
"name": "Camera Matrimoniale",
"price": "125.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "intermediate"
}
]
}
]
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"type": "standard",
"series": "SAMPLE",
"code": "002",
"issue_date": "2023-05-21",
"currency": "EUR",
"tax": {
"prices_include": "VAT",
"ext": {
"it-sdi-document-type": "TD01",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "Hotel California",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Mela S.r.l.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"i": 1,
"quantity": "1",
"item": {
"name": "Tassa di Soggiorno",
"price": "1.00"
},
"sum": "1.00",
"taxes": [
{
"cat": "VAT",
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
}
}
],
"total": "1.00"
},
{
"i": 2,
"quantity": "1",
"item": {
"name": "Camera Matrimoniale",
"price": "125.00"
},
"sum": "125.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "intermediate",
"percent": "10.0%"
}
],
"total": "125.00"
}
],
"totals": {
"sum": "126.00",
"tax_included": "11.36",
"total": "114.64",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
},
"base": "1.00",
"amount": "0.00"
},
{
"key": "standard",
"base": "113.64",
"percent": "10.0%",
"amount": "11.36"
}
],
"amount": "11.36"
}
],
"sum": "11.36"
},
"tax": "11.36",
"total_with_tax": "126.00",
"payable": "126.00"
}
}
```
In this example, we're issuing a B2G invoice from an Italian supplier to the italian Government.
Notice:
* both supplier and customer have their Partita IVA (VAT number) and Codice Fiscale properly specified,
* the minimal version contains only essential fields; `gobl build` handles all calculations,
* when running `gobl build`, the system automatically calculates totals, applies IVA rates, and normalizes the document according to SDI requirements,
* the built version shows all calculated fields including tax breakdowns, line totals, payment terms, and final amounts,
* the [`it-sdi-v1`](https://docs.gobl.org/addons/it-sdi-v1) addon validates the document structure for B2B transactions, and,
* the invoice will be transmitted through the SDI system and delivered to the customer's designated channel.
```json SDI B2G Invoice theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": ["it-sdi-v1"],
"$tags": ["b2g"],
"series": "PA",
"code": "2026-001",
"issue_date": "2026-05-08",
"currency": "EUR",
"supplier": {
"name": "Esempio Fornitore SRL",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
},
"addresses": [
{
"num": "10",
"street": "Via Roma",
"locality": "Milano",
"region": "MI",
"code": "20121",
"country": "IT"
}
],
"emails": [
{"addr": "amministrazione@esempio-fornitore.it"}
]
},
"customer": {
"name": "Comune di Roma",
"tax_id": {
"country": "IT",
"code": "02438750586"
},
"addresses": [
{
"num": "1",
"street": "Piazza del Campidoglio",
"locality": "Roma",
"region": "RM",
"code": "00186",
"country": "IT"
}
],
"inboxes": [
{
"key": "it-sdi-code",
"code": "UF9DN8"
}
]
},
"lines": [
{
"quantity": "20",
"item": {
"name": "Servizi di consulenza informatica",
"price": "150.00",
"unit": "h"
},
"taxes": [
{
"cat": "VAT",
"rate": "standard"
}
]
},
{
"quantity": "1",
"item": {
"name": "Licenza software annuale",
"price": "1200.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "standard"
}
]
}
],
"payment": {
"instructions": {
"key": "credit-transfer",
"ext": {
"it-sdi-payment-means": "MP05"
},
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"name": "Banca Esempio SpA",
"bic": "BPMOIT22XXX"
}
]
},
"terms": {
"due_dates": [
{
"date": "2026-06-07",
"percent": "100%"
}
]
}
},
"notes": [
{
"key": "general",
"text": "Fattura emessa verso Pubblica Amministrazione tramite SDI. CIG: Z1A2B3C4D5 - CUP: F81B12000000001"
}
]
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"$tags": [
"b2g"
],
"type": "standard",
"series": "PA",
"code": "2026-001",
"issue_date": "2026-05-08",
"currency": "EUR",
"tax": {
"ext": {
"it-sdi-document-type": "TD01",
"it-sdi-format": "FPA12"
}
},
"supplier": {
"name": "Esempio Fornitore SRL",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "10",
"street": "Via Roma",
"locality": "Milano",
"region": "MI",
"code": "20121",
"country": "IT"
}
],
"emails": [
{
"addr": "amministrazione@esempio-fornitore.it"
}
],
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Comune di Roma",
"tax_id": {
"country": "IT",
"code": "02438750586"
},
"inboxes": [
{
"key": "it-sdi-code",
"code": "UF9DN8"
}
],
"addresses": [
{
"num": "1",
"street": "Piazza del Campidoglio",
"locality": "Roma",
"region": "RM",
"code": "00186",
"country": "IT"
}
]
},
"lines": [
{
"i": 1,
"quantity": "20",
"item": {
"name": "Servizi di consulenza informatica",
"price": "150.00",
"unit": "h"
},
"sum": "3000.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "general",
"percent": "22.0%"
}
],
"total": "3000.00"
},
{
"i": 2,
"quantity": "1",
"item": {
"name": "Licenza software annuale",
"price": "1200.00"
},
"sum": "1200.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "general",
"percent": "22.0%"
}
],
"total": "1200.00"
}
],
"payment": {
"terms": {
"due_dates": [
{
"date": "2026-06-07",
"amount": "5124.00",
"percent": "100%"
}
]
},
"instructions": {
"key": "credit-transfer",
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"bic": "BPMOIT22XXX",
"name": "Banca Esempio SpA"
}
],
"ext": {
"it-sdi-payment-means": "MP05"
}
}
},
"totals": {
"sum": "4200.00",
"total": "4200.00",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "standard",
"base": "4200.00",
"percent": "22.0%",
"amount": "924.00"
}
],
"amount": "924.00"
}
],
"sum": "924.00"
},
"tax": "924.00",
"total_with_tax": "5124.00",
"payable": "5124.00"
},
"notes": [
{
"key": "general",
"text": "Fattura emessa verso Pubblica Amministrazione tramite SDI. CIG: Z1A2B3C4D5 - CUP: F81B12000000001"
}
]
}
```
This example matches the **B2B invoice** above but adds a **€2.00 Marca da bollo** (stamp duty) as a document-level charge.
**Flat-rate scheme (*forfettario*):** taxpayers using the *regime forfettario* do **not** charge VAT on their invoices. When the document total goes **above €77.47**, they must account for **imposta di bollo**—typically by adding a **€2.00** stamp duty line, as in this sample. (Thresholds and rules can change; confirm with your adviser or the Agenzia delle Entrate if in doubt.)
Notice:
* the `charges` array includes an entry with `"key": "stamp-duty"`, amount `"2.00"`, and reason `Imposta di bollo`,
* the minimal version is otherwise the same as the B2B example; `gobl build` recalculates totals including the charge,
* the built version shows `totals.charge` and a higher `payable` / `total_with_tax` than the plain B2B invoice,
* the [`it-sdi-v1`](https://docs.gobl.org/addons/it-sdi-v1) addon continues to validate the document for SDI transmission.
```json SDI Stamp duty invoice (Marca da Bollo) theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"series": "SAMPLE",
"code": "002",
"issue_date": "2023-05-21",
"currency": "EUR",
"tax": {
"prices_include": "VAT"
},
"supplier": {
"name": "Hotel California",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Mela S.r.l.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"quantity": "1",
"item": {
"name": "Tassa di Soggiorno",
"price": "1.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "exempt",
"ext": {
"it-sdi-exempt": "N4"
}
}
]
},
{
"quantity": "1",
"item": {
"name": "Camera Matrimoniale",
"price": "125.00"
},
"taxes": [
{
"cat": "VAT",
"rate": "intermediate"
}
]
}
],
"charges": [
{
"key": "stamp-duty",
"i": 1,
"amount": "2.00",
"reason": "Imposta di bollo"
}
]
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"type": "standard",
"series": "SAMPLE",
"code": "002",
"issue_date": "2023-05-21",
"currency": "EUR",
"tax": {
"prices_include": "VAT",
"ext": {
"it-sdi-document-type": "TD01",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "Hotel California",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"num": "102",
"street": "Via California",
"locality": "Palermo",
"region": "PA",
"code": "33213",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Mela S.r.l.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "23",
"street": "Via dei Mille",
"locality": "Firenze",
"region": "FI",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"i": 1,
"quantity": "1",
"item": {
"name": "Tassa di Soggiorno",
"price": "1.00"
},
"sum": "1.00",
"taxes": [
{
"cat": "VAT",
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
}
}
],
"total": "1.00"
},
{
"i": 2,
"quantity": "1",
"item": {
"name": "Camera Matrimoniale",
"price": "125.00"
},
"sum": "125.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "intermediate",
"percent": "10.0%"
}
],
"total": "125.00"
}
],
"charges": [
{
"i": 1,
"key": "stamp-duty",
"reason": "Imposta di bollo",
"amount": "2.00"
}
],
"totals": {
"sum": "126.00",
"charge": "2.00",
"tax_included": "11.36",
"total": "116.64",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
},
"base": "1.00",
"amount": "0.00"
},
{
"key": "standard",
"base": "113.64",
"percent": "10.0%",
"amount": "11.36"
}
],
"amount": "11.36"
}
],
"sum": "11.36"
},
"tax": "11.36",
"total_with_tax": "128.00",
"payable": "128.00"
}
}
```
In this example, we're issuing a comprehensive B2B invoice with additional optional fields such as ordering information, payment details, and document references.
Notice:
* this invoice demonstrates advanced SDI features like CIG/CUP codes, payment methods, and bank details,
* the minimal version includes ordering and payment details; `gobl build` calculates all totals,
* when running `gobl build`, the system validates all additional fields according to SDI specifications and calculates totals,
* the built version shows the complete document with all calculated fields, tax breakdowns, and properly formatted additional information,
* additional fields like `ordering`, `payment`, and document references are important for public administration invoices (B2G), and,
* the addon ensures all optional fields are properly validated and formatted for SDI transmission.
```json SDI B2B Invoice with additional fields theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"$tags": [
"freelance"
],
"series": "SAMPLE",
"code": "001",
"issue_date": "2023-03-02",
"currency": "EUR",
"supplier": {
"name": "MªF. Services",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"people": [
{
"name": {
"given": "GIANCARLO",
"surname": "ROSSI"
}
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELLA LIBERTÀ",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "billing@example.com"
}
],
"telephones": [
{
"num": "999999999"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF02"
}
},
"customer": {
"name": "MARIO LEONI",
"tax_id": {
"country": "IT",
"code": "09876543217"
},
"people": [
{
"name": {
"prefix": "Dott.",
"given": "MARIO",
"surname": "LEONI"
}
}
],
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELI LAVORATORI",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "mario@example.com"
}
]
},
"lines": [
{
"quantity": "20",
"item": {
"name": "Development of accounting software",
"price": "10.00",
"unit": "h"
},
"taxes": [
{
"cat": "VAT",
"rate": "standard"
}
]
}
],
"payment": {
"instructions": {
"key": "credit-transfer",
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"name": "MªF. Services"
}
]
},
"terms": {
"due_dates": [
{
"date": "2023-09-01",
"percent": "100%"
}
]
}
}
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"$tags": [
"freelance"
],
"type": "standard",
"series": "SAMPLE",
"code": "001",
"issue_date": "2023-03-02",
"currency": "EUR",
"tax": {
"ext": {
"it-sdi-document-type": "TD06",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "MªF. Services",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"people": [
{
"name": {
"given": "GIANCARLO",
"surname": "ROSSI"
}
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELLA LIBERTÀ",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "billing@example.com"
}
],
"telephones": [
{
"num": "999999999"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF02"
}
},
"customer": {
"name": "MARIO LEONI",
"tax_id": {
"country": "IT",
"code": "09876543217"
},
"people": [
{
"name": {
"prefix": "Dott.",
"given": "MARIO",
"surname": "LEONI"
}
}
],
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELI LAVORATORI",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "mario@example.com"
}
]
},
"lines": [
{
"i": 1,
"quantity": "20",
"item": {
"name": "Development of accounting software",
"price": "10.00",
"unit": "h"
},
"sum": "200.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "general",
"percent": "22.0%"
}
],
"total": "200.00"
}
],
"payment": {
"terms": {
"due_dates": [
{
"date": "2023-09-01",
"amount": "244.00",
"percent": "100%"
}
]
},
"instructions": {
"key": "credit-transfer",
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"name": "MªF. Services"
}
],
"ext": {
"it-sdi-payment-means": "MP05"
}
}
},
"totals": {
"sum": "200.00",
"total": "200.00",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "standard",
"base": "200.00",
"percent": "22.0%",
"amount": "44.00"
}
],
"amount": "44.00"
}
],
"sum": "44.00"
},
"tax": "44.00",
"total_with_tax": "244.00",
"payable": "244.00"
}
}
```
In this example, we're issuing an invoice for goods or services that are exempt from VAT (IVA).
Notice:
* the line item includes a tax with `"key": "exempt"` indicating this is a VAT-exempt transaction,
* the minimal version omits the exemption code extension (`it-sdi-exempt`), which will be automatically added during `gobl build`,
* when running `gobl build`, the system calculates totals with zero VAT and validates the exemption structure,
* the built version shows the complete document with the exemption code extension (e.g., `"it-sdi-exempt": "N4"`) applied to the tax rate,
* exemption codes must comply with SDI requirements—consult the [complete list of exemption reasons](https://docs.gobl.org/addons/it-sdi-v1#it-sdi-exempt) in the GOBL documentation,
* common exemption codes include N4 (exempt), N3.1 (exports), N3.2 (intra-community supplies), and N6.x (reverse charge scenarios), and,
* the SDI validates that exempt invoices include proper exemption codes before transmission.
```json SDI Exempt Invoice theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"code": "INVOICE-001",
"supplier": {
"name": "Example IT Supplier S.r.l.",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"street": "Via Roma, 123",
"locality": "Milan",
"code": "20121",
"country": "IT"
}
],
"emails": [
{
"addr": "info@supplier.it"
}
]
},
"customer": {
"name": "Example IT Customer S.p.A.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"addresses": [
{
"street": "Via Dante, 456",
"locality": "Rome",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"quantity": "10",
"item": {
"name": "Tax Exempt Service",
"price": "100.00"
},
"taxes": [
{
"cat": "VAT",
"key": "exempt"
}
]
}
]
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"type": "standard",
"code": "INVOICE-001",
"issue_date": "2026-04-20",
"currency": "EUR",
"tax": {
"ext": {
"it-sdi-document-type": "TD01",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "Example IT Supplier S.r.l.",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"addresses": [
{
"street": "Via Roma, 123",
"locality": "Milan",
"code": "20121",
"country": "IT"
}
],
"emails": [
{
"addr": "info@supplier.it"
}
],
"ext": {
"it-sdi-fiscal-regime": "RF01"
}
},
"customer": {
"name": "Example IT Customer S.p.A.",
"tax_id": {
"country": "IT",
"code": "13029381004"
},
"addresses": [
{
"street": "Via Dante, 456",
"locality": "Rome",
"code": "00100",
"country": "IT"
}
]
},
"lines": [
{
"i": 1,
"quantity": "10",
"item": {
"name": "Tax Exempt Service",
"price": "100.00"
},
"sum": "1000.00",
"taxes": [
{
"cat": "VAT",
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
}
}
],
"total": "1000.00"
}
],
"totals": {
"sum": "1000.00",
"total": "1000.00",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "exempt",
"ext": {
"it-sdi-exempt": "N4"
},
"base": "1000.00",
"amount": "0.00"
}
],
"amount": "0.00"
}
],
"sum": "0.00"
},
"tax": "0.00",
"total_with_tax": "1000.00",
"payable": "1000.00"
}
}
```
In this example, we're issuing a credit note (nota di credito) to correct or refund a previously issued invoice.
Notice:
* the `type` field is set to `credit-note` to indicate this is a corrective document,
* the `preceding` field references the original invoice being corrected,
* the minimal version contains only essential correction details; `gobl build` calculates negative amounts,
* when running `gobl build`, the system automatically calculates negative totals, IVA refunds, validates the credit note structure, and applies SDI rules,
* the built version shows all calculated fields including negative amounts for the refund and proper tax adjustments,
* credit notes must be properly linked to the original invoice and transmitted through SDI, and,
* the SDI system validates the credit note format before accepting and forwarding it to the recipient.
```json SDI Credit Note theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"$tags": [
"freelance"
],
"type": "credit-note",
"series": "CN",
"code": "001",
"issue_date": "2024-10-09",
"currency": "EUR",
"preceding": [
{
"uuid": "0190c0ec-8109-756b-a4f0-88c4b542ab6e",
"type": "standard",
"issue_date": "2023-03-02",
"series": "SAMPLE",
"code": "001"
}
],
"supplier": {
"name": "MªF. Services",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"people": [
{
"name": {
"given": "GIANCARLO",
"surname": "ROSSI"
}
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELLA LIBERTÀ",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF02"
}
},
"customer": {
"name": "MARIO LEONI",
"tax_id": {
"country": "IT",
"code": "09876543217"
},
"people": [
{
"name": {
"prefix": "Dott.",
"given": "MARIO",
"surname": "LEONI"
}
}
],
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELI LAVORATORI",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "mario@example.com"
}
]
},
"lines": [
{
"quantity": "20",
"item": {
"name": "Development of accounting software",
"price": "10.00",
"unit": "h"
},
"taxes": [
{
"cat": "VAT",
"rate": "standard"
}
]
}
],
"payment": {
"instructions": {
"key": "credit-transfer",
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"name": "MªF. Services"
}
]
}
}
}
```
```json Built version theme={"system"}
{
"$schema": "https://gobl.org/draft-0/bill/invoice",
"$regime": "IT",
"$addons": [
"it-sdi-v1"
],
"$tags": [
"freelance"
],
"type": "credit-note",
"series": "CN",
"code": "001",
"issue_date": "2024-10-09",
"currency": "EUR",
"preceding": [
{
"uuid": "0190c0ec-8109-756b-a4f0-88c4b542ab6e",
"type": "standard",
"issue_date": "2023-03-02",
"series": "SAMPLE",
"code": "001"
}
],
"tax": {
"ext": {
"it-sdi-document-type": "TD04",
"it-sdi-format": "FPR12"
}
},
"supplier": {
"name": "MªF. Services",
"tax_id": {
"country": "IT",
"code": "12345678903"
},
"people": [
{
"name": {
"given": "GIANCARLO",
"surname": "ROSSI"
}
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELLA LIBERTÀ",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"registration": {
"capital": "50000.00",
"currency": "EUR",
"office": "RM",
"entry": "123456"
},
"ext": {
"it-sdi-fiscal-regime": "RF02"
}
},
"customer": {
"name": "MARIO LEONI",
"tax_id": {
"country": "IT",
"code": "09876543217"
},
"people": [
{
"name": {
"prefix": "Dott.",
"given": "MARIO",
"surname": "LEONI"
}
}
],
"inboxes": [
{
"key": "it-sdi-code",
"code": "M5UXCR5"
}
],
"addresses": [
{
"num": "1",
"street": "VIALE DELI LAVORATORI",
"locality": "ROMA",
"region": "RM",
"code": "00100",
"country": "IT"
}
],
"emails": [
{
"addr": "mario@example.com"
}
]
},
"lines": [
{
"i": 1,
"quantity": "20",
"item": {
"name": "Development of accounting software",
"price": "10.00",
"unit": "h"
},
"sum": "200.00",
"taxes": [
{
"cat": "VAT",
"key": "standard",
"rate": "general",
"percent": "22.0%"
}
],
"total": "200.00"
}
],
"payment": {
"instructions": {
"key": "credit-transfer",
"credit_transfer": [
{
"iban": "IT60X0542811101000000123456",
"name": "MªF. Services"
}
],
"ext": {
"it-sdi-payment-means": "MP05"
}
}
},
"totals": {
"sum": "200.00",
"total": "200.00",
"taxes": {
"categories": [
{
"code": "VAT",
"rates": [
{
"key": "standard",
"base": "200.00",
"percent": "22.0%",
"amount": "44.00"
}
],
"amount": "44.00"
}
],
"sum": "44.00"
},
"tax": "44.00",
"total_with_tax": "244.00",
"payable": "244.00"
}
}
```
## Technical Details
When the SDI step processes a document, it returns detailed status codes that provide information about the response from SDI:
| Code | Description |
| ---------------- | --------------------------------------------------------------------------------------------------------------------------- |
| `rejected` | **Notifica di scarto (NS)**
SDI has rejected the invoice because it contains errors. |
| `delivered` | **Ricevuta consegna (RC)**
SDI has successfully delivered a B2B invoice to the recipient. |
| `delivered-pa` | **Ricevuta consegna (RC)**
SDI has successfully delivered an invoice to a Public Administration (PA). |
| `not-delivered` | **Mancata consegna (MC)**
SDI could not deliver the invoice to the recipient. |
| `not-delivered` | **Attestazione trasmissione con impossibilità di recapito (AT)**
SDI couldn't deliver an invoice to PA after 10 days. |
| `accepted-pa` | **Notifica esito (NE)**
A PA has decided to accept an invoice (outcome EC01). |
| `rejected-pa` | **Notifica esito (NE)**
A PA has decided to reject an invoice (outcome EC02). |
| `deadline-terms` | **Notifica decorrenza termini (DT)**
A PA didn't reply with acceptance or rejection within 15 days. |
| `invoice-error` | An error occurred during the acquisition of a notification. |
| `sent` | The invoice has been submitted to SDI and is awaiting a response. |
| `not-received` | The invoice was not received by the recipient. |
Some SDI notifications (File metadati - MT, Esito committente - EC, Scarto esito committente - SE) don't directly change the code of the invoice.
These codes map to different step results as follows:
* **OK Result**: `delivered`, `not-delivered`, `not-received`, `accepted-pa`
* **KO Result**: `rejected`, `rejected-pa`, `invoice-error`, `deadline-terms`
* **QUEUED Result**: `sent`, `delivered-pa`
When a step returns `QUEUED`, the workflow will check again later for updates from SDI.
## FAQ
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](https://docs.gobl.org/regimes/it) for tax categories, codice fiscale rules, and SDI-specific extensions. The [`it-sdi-v1`](https://docs.gobl.org/addons/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](/guides/it-sdi-receiving) 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:
```json Supplier with Partita IVA and Codice Fiscale theme={"system"}
{
"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](/guides/it-sdi-receiving) guide.
More available in our [Italy FAQ](/faq/italy) section
***
| | |
| ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Compliance | [Invoicing compliance in Italy](/compliance/italy)
[Compliance timeline](/timelines/italy) |
| Apps | [SDI Italy](/apps/sdi-italy)
[Smart Receipts Italy](/apps/smart-receipts-italy) |
| Guides | [SDI Sending Guide](/guides/it-sdi-sending)
[SDI Receiving Guide](/guides/it-sdi-receiving)
[Ticket Guide](/guides/it-ticket) |
| FAQ | [Italy FAQ](/faq/italy) |
| GOBL | [Italy Tax Regime](https://docs.gobl.org/regimes/it)
[Italy SDI FatturaPA Addon](https://docs.gobl.org/addons/it-sdi-v1)
[Italy AdE Ticket Addon](https://docs.gobl.org/addons/it-ticket-v1) |
| GitHub | [gobl.fatturapa](https://github.com/invopop/gobl.fatturapa) |
Ask and answer questions about invoicing in Italy →