In past 10 years from now, the countries where you stayed longer than 6 months include your birth&grow up place. You need to provide police certification, check in document checklist, there are a link is mentioned, go to their link to have their instructions if you're not sure. They will follow form Schedule A-Background eIMM 5669 where you declared where have you been and ask you to provide police cert follow that. I believe except: if you are in Canada right now and they don't need it if you apply Sponsorship inside Canada because you can be asked to do finger print in Canand, otherwise if you were in Canada before and stay more than 6 months, now you're outside Canada, so you need it from Canada or not, consult with your MP is better.