Hello, we received our COPRs and we plan on landing in Canada in two days. I received today a most disturbing email from someone who heard of other people who have been asked on the Canadian side to give up their US green cards (at the moment of Landing), because one can not be resident in both countries. I cannot give up our green cards right away, because for a few months I have to be able to re-enter the US with that Green Card. What is other peoples' experiences? Could it happen?