Linking the POS / Payment Terminal with RT Online
The 2025 Budget Law introduced the obligation to link electronic payment terminals to RT online, starting from 1 January 2026.
Why is this important?
The linkage is the mechanism that lets the tax system connect "how you got paid" to "what you fiscally certified".
Open Fiskal uses the Documento Commerciale Online (DCO) system from the Agenzia delle Entrate. Note that this connection is only registered online in the "Fatture e Corrispettivi" portal, it is not a physical connection between devices.
Until when do you have to do it?
Scenario | Connection Window |
|---|---|
Payment Terminal held on Jan 1, 2026 (or acquired in Jan) | Until April 19th (45 days after the portal availability date March 5th) |
Terminal Changes after Jan 31, 2026, including: New Terminal, Replacement of Terminal, Change of the terminal's financial operator/acquirer, Decommissioning of Terminal | Between the 6th day of the second month following the change and the last working day of that same month. |
What's the penalty if you miss it?
Following the new Budget Law, D.Lgs. 471/1997, art. 11(5), which previously only covered failures to install a fiscal terminal, now also includes failures to link a payment terminal to the RT.
The fine for missing the linking ranges from €1,000 to €4,000. However, there is also a risk of accessory sanctions including the suspension of the business license/authorization.
How to do it
Please follow this guide, prepared by our partner Fiskaly:
The steps in the portal are:
- Log in to Fatture e Corrispettivi with SPID, CIE, CNS or Fisconline/Entratel
- Navigate to Corrispettivi → Documento Commerciale Online → Funzionalità di supporto → Collegamento con strumenti di pagamento elettronico
- Click "Inserisci collegamento" — if your terminal is already listed, select it and click "Collega". If not, click "Aggiungi nuovo POS" to enter details manually
- For manual entry: search for your Acquirer, select the POS type (Fisico/Online), enter the Terminal ID and contract number, then save and confirm
Finding the Terminal ID
Shopify Payments:
To register your Shopify payment tools you need two things:
- The Terminal ID (physical terminals only) — this is the serial number of the card reader:
Device | Where to find the serial number |
|---|---|
WisePad 3 | Printed on the back of the device |
POS Terminal | Printed on the back of the device |
Tap to Pay on iPhone/Android | In the Shopify POS app, in the reader settings |
Other | On the device or in Shopify POS; if not found, contact Shopify Support |
- Your Shopify Payments agreement number — contact Shopify Support to request this. Use it as the contract number when registering in the portal.
The Acquirer for Shopify Payments is Stripe Technology Europe, Limited — not Shopify. Search for "Stripe" in the Acquirer field in the portal. If it doesn't appear in the dropdown, add it manually.
SumUp Card readers:
The Terminal ID is the Serial number of the card reader. You can find it in the SumUp app or in your device settings.
SumUp Tap to Pay:
The Terminal ID is a unique code generated each time Tap To Pay is activated on a device. Read this SumUp Support Article for details.
Satispay:
Satispay is treated as a Virtual Terminal, thus you don't need to enter a Terminal ID. Read this Satispay Support Article for details.
More Information
Updated on: 09/04/2026
Thank you!