so if you get banned what stops someone from changing ISP and using a PO box??? Pretty sure that rules would be the same for Canada (Maybe) and no i am not banned...not planning on it either
you can have a check sent to a p.o. box. as for PIN,in 2006 i couldn't.it might have changed since then. the easy way to find out is,enter a p.o. address and if it is not allowed it will tell you that the address can't be a p.o. box.
I think you will get a better answer contacting Google AdSense directly. At least they will clear any doubts