Using PO box for physical contact address

Would anyone know if it would be OK to use a PO BOX for signing up with Admob, also, I would like to use it for a Google wallet merchant account.

Also, it would be good for the new policy update starting September 30th as lots of you may know.

Would this be OK for me to do?

Man, you could put “lol I live @ home” as your address and nobody is going to notice. The important thing is that you have access in case they send you a mail with confirmation code or something. Or some lawsuit for example.