Activating the mobile phone signature ("Handy-Signatur")

The mobile phone signature ("Handy-Signatur") is your personal signature which you can use to identify yourself clearly on the internet. It allows you to sign documents and accounts legally. It is equivalent to a handwritten signature and is therefore your digital passport on the internet.

Apply for a mobile phone signature now – your legal electronic signature.

A summary of the benefits

  • Your digital passport on the internet;
  • A convenient legal signature for electronic documents;
  • Complete formalities online and use commercial electronic services;
  • Extremely secure and free to use.


  • A mobile phone that must be able to receive SMS messages (it does not have to be a smartphone);
  • which has an Austrian or German SIM card;
  • which can be a pay-as-you-go phone.


EU citizens need an Austrian telephone number to activate the mobile phone signature.

How to obtain your mobile phone signature

Registration authority

You can activate it in person at a registration authority or tax office anywhere in Austria.


  • an official photo ID card;
  • Time needed: a few minutes, although you must book an appointment

Follow this link for a list of registration authorities (→ Bürgerkarte)German text


Apply to activate the mobile phone signature on FinanzOnline. Log in with your FinanzOnline login details and select ‘Bürgerkarte/Handy-Signatur aktivieren’ [activate citizen's card/mobile phone signature] from the menu.


  • FinanzOnline login details
  • time needed: You will receive a letter of confirmation within a few days.

Follow this link FinanzOnline (→ BMF)German text

Go to your online account with Österreichische Post AG to activate your mobile phone signature in four easy steps.

Follow this link to go to  → Österreichische Post AGGerman text

Students and teachers can activate their mobile phone signature online by going to


  • a minimum age of 14;
  • resident in Austria.

Follow this link to go to  → edugov.gv.atGerman text

Translated by the European Commission
last update: 26 January 2021

responsible for content: Federal Ministry for Digital and Economic Affairs

Rate this page and help us to improve.