An employer can contact Service Canada’s Social Insurance Registration Office at 1-800-206-7218 and select option “3” or at 1-506-548-7961 if outside of Canada (long distance charges apply) to confirm the SIN of a current or former employee, and ensure that...

  How to protect your SIN If you have a SIN card, do not carry it in your wallet or purse—store it in a safe place Never use your SIN as a piece of identification Provide your SIN only when...

Some Child Tax Benefits applicants who do not have appropriate immigration document do not qualify to obtain a Social Insurance Number. Under this circumstances, client must not call Social Insurance Registry for help. Client who has received a letter from...