Please tab on the driver's license validation via your user profile in the app or in the web portal.
There you will find a button to go to the digital driver's license validation. The app will direct you to validation and explain what documents are needed.
After successful validation, you will receive a confirmation by email and can then book a vehicle directly in the app.
The data is checked by an external service provider (Jumio, Netverify, etc.), but not saved or passed on to third parties.