You may not allow anyone else to drive with your account, including friends or family.
Friends and family may drive a Poppy themselves, but then they must first register themselves on www.poppy.be or via the application before they can drive a Poppy vehicle.
If you have a Poppy account, other people may, of course, be taken as passengers during your trip with a car. Only one person can drive a Poppy scooter. Taking someone else on with you on the scooter is strictly prohibited and you are not insured if you do this.