Got phone call from this number, asking to veryfy the application for the employee--- we actually don't have this person in our location then starting ask about SIN number thing...So be careful this kind caller and do not give any of personal information to them.

its usually from a company called Back-Check, who is outsourced from other companies to check the verity of security clearances, applications, ect. its up to you to decide what information you wish to give them. also try to keep in mind what applications and so forth you applied for and have them verify it to you too.