I was a Canadian PR and stayed only for 18 months in Canada, then moved to USA for job opportunity. I know I did not maintain PR status, therefore, I went to Consulate to apply for tourist visa. Every time, I go to Canada, I am stopped at Canadian Border and then I have to explain that I did not maintain PR,therefore, I am travelling on tourist visa. It is still showing that I am a PR in their system. I am interested in coming back to Canada, but I don't know if I need to apply fresh PR or should I request to give me existing PR card (if still valid) so that I can move to Canada. Someone told me that I can request for PR on humanitarian ground, but then how should I do that? Please advise.