They must obtain an original police certificate from each country or territory where they have lived for six consecutive months or longer since reaching the age of 18. 如果来加拿大探亲超过6个月，还得提供加拿大这边的。
It is their responsibility to contact the police or relevant authorities; note that in many countries, this process takes time. Instructions and information on obtaining a police certificate from any country can be found on our Web site at www.cic.gc.ca/english/information/security/police-cert/index.asp.
Once obtained, the police certificates can either be sent with the complete application or when the visa office requests them.
It is their responsibility to contact the police or relevant authorities; note that in many countries, this process takes time. Instructions and information on obtaining a police certificate from any country can be found on our Web site at www.cic.gc.ca/english/information/security/police-cert/index.asp.
Once obtained, the police certificates can either be sent with the complete application or when the visa office requests them.