How Do I Licsence A Trailer How Safe Is It To Drive With A Sticker Licsence Plate?and What Is The Consequences If I Get Caught With It?

How safe is it to drive with a sticker licsence plate?and what is the consequences if I get caught with it? - how do i licsence a trailer

Well, today I have my first car and I base my liscence yet, so I have time to put a sticker on my window to my right to buy the right pads do u think is a bad idea?