When you have booked a Hely car, a friend or family member can also drive in the vehicle under the following conditions:
This person also has a completely verified and active Hely account
The person who booked the car has to be present at all times
So you can enjoy being able to both drive the car during, for example, a longer trip or a holiday. Just make sure to both be present. If your travel companion does not have an Hely account, than it unfortunately is not a possibility to let them drive the vehicle. It is not allowed and has consequences.