What is a social insurance number

[TurboTaxJeffrey · Accepted solution]

"The Social Insurance Number (SIN) is a nine-digit number that you need to work in Canada or to have access to government programs and benefits.

A SIN is issued to one person only and it cannot legally be used by anyone else. You are responsible for protecting your SIN. Store any document containing your SIN and personal information in a safe place—do not keep your SIN with you."

For more information, visit:

https://www.canada.ca/en/employment-social-development/services/sin.html