When you apply for the Canadian Permanent Resident visa, you have to attach a police certificate to your application.

You must attach:

Police certificates of good conduct (Original document) from each country, state or territory in which you and everyone included in the application (18 years of age or over) have lived for six months or longer (since reaching 18 years of age)

You should submit your original fingerprints to the authorities conducting the police checks or clearances

If the authority in the country where you obtained your certificate will forward the result directly to Citizenship and Immigration Canada, you should attach a note explaining the situation

Please note that:

A Police Certificate is required from ALL countries where the applicant and his/her family have resided in for 6 months or more since reaching age 18, along with the country where the applicant currently lives This certificate should be issued by a national or federal police agency if possible. If you do not currently reside in that country, you may need to apply at the local Embassy or High Commission in your country of residence.

A Police Certificate (also called certificate of no criminal record), is necessary for every applicant age 18 and older You should present original Police Certificates and also an original accredited translation if the certificates are not in English or French.

The Police Certificate (s) must have been issued in the last six months.

It takes a while to find the authority responsible for issuing the police certificate and to process the document.

However, if you want to contact the Police authority in your country of residence TODAY, I highly recommend downloading Step-by-Step Immigration to Canada, which contains a directory with the contact details of the Police authorities and it also explains step-by-step how to apply for this document.