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Details
Number NAS2120
Title Application for a Social Insurance Number
Purpose If you are applying online or in-person at a Service Canada Centre, you do not need to complete this application form.

To apply for a first-time Social Insurance Number (SIN), to obtain a confirmation of your SIN, or to modify your SIN record, complete this application form:

Your application must be accompanied by original and valid identity documents. Service Canada is not responsible for documents lost in the mail. Refer to the Instruction Guide for more details.
GroupSocial Insurance Number
Important Information
Returning the Form

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SOCIAL INSURANCE NUMBER APPLICATION
PDF: NAS-2120, 497 KB, printed on 8 pages (8.5x11)

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