, Activate the digital signature of the Digital Mobile Key - gov.pt

Activate the digital signature of the Digital Mobile Key

With the Digital Mobile Key, you can sign digital documents using your phone. The signature with the Digital Mobile Key uses digital certificates recognized in the European Union and has the same validity as a written signature.

Service channels

Learn where you can carry out the service and what are the advantages of each channel

  • Activate now

    You need to have activated the Digital Mobile Key at a desk or on the Autenticação.gov portal

    Free of charge

    Activation is done in the reserved area of the Autenticação.gov portal

    This service can be done with video call support. Click on the "Support" button on the right side of the page to schedule a video call.

  • If you have activated the Digital Mobile Key through the Portal das Finanças (Finances Portal) or the TV BOX, you must activate the digital signature in person

    Free of charge

    Consult the "HOW TO" field to find out where you can activate the digital signature of the Digital Mobile Key

    Search for a point of service near you:

Who can activate the digital signature of the Digital Mobile Key?

Any person with a Digital Mobile Key can activate the digital signature of the Digital Mobile Key.

Additional information

Sign a digital document with the Digital Mobile Key

To sign documents with the Digital Mobile Key, you can

Learn more about the digital signature at the Autenticação.gov portal.

What is the support legislation?

Ordinance no. 312-A/2022, of 30 December - Second amendment to Ordinance no. 77/2018, of 16 March 2018, which regulates the development of the Digital Mobile Key (CMD))

Ordinance no. 190-A/2019, of 21 June - First amendment to Ordinance no. 77/2018, of 16 March 2018, which regulates the development of the Digital Mobile Key (CMD)

Ordinance no. 77/2018, of 16 March - Proceeds with the necessary regulations for the development of the Digital Mobile Key (CMD) and repeals Ordinance no. 189/2014, of 23 September 2014

Ordinance no. 189/2014, of 23 September - Proceeds with the necessary regulations for the development of the Digital Mobile Key

Law no. 37/2014 - Establishes an alternative and voluntary system for authenticating citizens on Public Administration portals and websites called the Digital Mobile Key.