Moin, the son has become 18 and should now be allowed to use the vehicles of the family. Of course, you specify this with the insurance and the one wants to have for the additional risk about 110 euros more for liability and comprehensively. But the other wants instead of 250 euros now over 900 euros. There is of course now the very strong desire to change the insurance immediately. And that had also written on the back: 7. You have the following possibility the contract to kündi … Termination in case of changed use If the type and use of your vehicle changes and the contribution increases by more than 10%, Siue can terminate the contract within one month after receipt of our notice without notice. Unfortunately, the insurance company only accepted our cancellation on 1.1.2014. I think that is wrong. In case of the price for the additional payment, I would have to pay my son out of this car again. And if he then drives, what is then? h on your comments. Thank you Jens