Okay,i understand, so your saying that my son can go with out a problem to canada even tho his PR card is expired. At the border in Berlin before you enter the airplane there is an immigration officer and they specifically ask where do you live, where are you going questions. And since my son will be going with his sister who is a Canadian citizen. He can go with no problem to Canada with an American passport and say he lives in Canada? Thank you and I'm waiting for a reply.