Polish admission – How – What – Why

Moin has such a question or a problem…. An acquaintance (Pole since 12 months reported /living here) was stopped last week with Polish license plates …. The car is half on his with immigrant sister, half on his mother living in Poland… Of course the fact of tax evasion was in the room … He really did not understand any more, since he can not yet really good German… However, he mentally tried to explain to the police officer that the car was in Poland all the time with his mother and he moved it only for a week in D…. Since I have to translate the days for him and don’t want to ride him knee-deep into the road… I want to ask myself… 1: What does he have to expect in punishment? 2: Can the car be moved until a letter comes from the police? 3: Does the car have to be registered in D or is there the possibility for the car to pay despite Poln registration the D car tax ???? and become cheap, since there is a pole in the car. Gas system is installed and the D Tüv likes to cross it… so… that was in the rough… Thank you already for qualified help in advance ….