The exact proceedings and methods of Security Check by visa post is not known to me. A Security/background check is different from police clearance. It is to verify if you have engaged in any espionage, terrorism, organized crime or been a danger to the security of Canada. Your background/security check could delay your application process if you have lived in a specific country, served in a certain military service or were a member of a specific organization.
Inadmissibility on criminal grounds
If you were convicted of or have committed a criminal offense, you may overcome this criminal inadmissibility by applying for a pardon (if the offense occurred in Canada) and/or rehabilitation (if the offense occurred outside of Canada).
Pardon (Convictions/Offenses in Canada):
In order to apply for a pardon, a specified period of time must have passed after the end of the sentence imposed (five years for indictment conviction and three years for two or more summary offenses). The sentence may have been payment of a fine, period of probation or imprisonment.
If you have had two or more summary convictions in Canada, you may be deemed rehabilitated and no longer inadmissible to Canada if:
* five years have passed since the sentence imposed was served or to be served;
* you have had no subsequent convictions and
* you have not been refused for a pardon.
Rehabilitation (Convictions/Offenses outside Canada):
In order to apply for rehabilitation status, a specified period of time must have passed after the end of the sentence imposed (five years for indictment conviction and no rehabilitation for summary offenses). The sentence may have been payment of a fine, a period of probation, or imprisonment.
You may be deemed to have been rehabilitated if a specified period of time (five years for two or more summary offenses and ten years for an indictment offense) has passed since you completed the sentence.
For a conviction punishable by a maximum terms of imprisonment of ten years or more, there is no "deemed to have been rehabilitated" status, so you must apply for rehabilitation.
The roll of CSIS ( Canadian Security Intelligence Service ) towards Immigration and Citizenship Screening
The provision of security advice in immigration and citizenship matters is crucial to countering imported threats to the security of Canada. The screening program serves as a first line of defence against those who attempt to penetrate the country to undermine Canadian security.
Working closely with Citizenship and Immigration Canada (CIC), the Service's Immigration Screening program's primary task is to provide security-related advice to CIC. The objective is to prevent persons who are inadmissible under the Immigration and Refugee Protection Act (IRPA) from entering or gaining status in Canada.
One important change, that has been introduced in the past few years, from a security screening point of view, is the adoption of Front End Screening (FES) for all refugee claimants to Canada. FES is a government initiative to ensure that all refugee claimants arriving in Canada are checked against CSIS and RCMP records before they are sent to the Immigration and Refugee Board. The initiative was implemented to identify and filter potential security and criminal cases from the refugee claimant stream as early as possible in the determination process. Prior to FES, CSIS did not screen refugee claimants.
In addition to its new responsibilities for Front End Screening, the Service, for many years, has had the responsibility for conducting security screening of immigrants and refugees who apply for permanent residence status from both within Canada and outside Canada. CSIS provides advice to the Minister of Citizenship and Immigration related directly to the security inadmissibility criteria contained in the Immigration and Refugee Protection Act. CSIS also provides CIC with security assessments on applicants for Canadian citizenship. CIC forwards all applications for citizenship to CSIS for review. The Service advises if any security concerns relating to a particular application surfaced in the course of its checks, and provides CIC with relevant security advice if such concerns come to light.
The use of information technology has greatly assisted in reducing the time needed to process requests from CIC. In 1996-1997, the Service began to receive its trace requests related to citizenship applications through an Electronic Data Exchange directly from CIC's Case Processing Centre in Sydney, Nova Scotia. Beginning in November 2001, CIC has also made available an input process for all immigration officers in Canada, enabling CIC front-line officers to send data to CSIS electronically, greatly facilitating the front end screening process. Screening requests for immigrants applying to CIC from within Canada are now all conducted electronically between the Service and CIC. Requests related to immigrants applications from outside of Canada traditionally took longer to process since such applications were sent to the Service on hard copy forms and mailed via diplomatic bags. However, electronic exchange systems installed at posts abroad have significantly reduced turnaround times. CSIS is also increasing the number of liaison officers abroad to further improve processing of these applications and reduce existing backlogs.