I currently live outside of Canada and have been granted a permanent residence/confirmation of permanent residence (COPR). My understanding is that, I have to go to Canada before the expiry date and apply for a PR card. Assuming that I have relatives/friends in Canada whose address I could use to have the PR card sent to, can I just stay in Canada for, say, 3 days? What's the minimum amount of days I have to stay in Canada if I'm going there just to ensure that my PR status is not expired.