You can get a ID-Verification bandage by starting the ID verification (you will have to pay 60 e*g). Sofort has 2 options. The 1st option is to verify using online banking and the 2nd option is with your ID-Card. If its not working you can send a PM to Luke (check the Support site)
[Only registered and activated users can see links. Click Here To Register...]
My verification failed at Sofort and I don't know why (I'm of legal age but Sofort didn't accept my online banking nor my ID) so I sent Luke a message.