Your Samleikin must be renewed every two years
How to renew Samleikin Samleikin - Your Personal Digital Identification
How to start using Samleikin How to get Samleikin with a foreign passport 
How to register Samleikin
If you have a Faroese or Danish passport, you can register directly in the Samleikin app.
Read more about what to do, if you have a foreign passport in the link below
Where can you use Samleikin?