Form NAS-2120, Social Insurance Number Application, is the document a person will need to complete who is seeking to obtain a social insurance number (SIN) in Canada.
A Social Insurance Number Application can be used when you are applying for your SIN for the first time, confirming your SIN, or need to modify your records connected to your SIN. Applicants who live further than 100 km from a Service Canada office or have mitigating circumstances (such as caring for a family member or personal health condition) that prevent them from being able to access an office can complete the application process by mail. This form is issued by Service Canada and was last updated February 1, 2020. A fillable Social Insurance Number Application is available for download below.
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