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Number NAS2120
Title Application for a Social Insurance Number
Purpose You do not need to complete this application form if you are applying in-person at a Service Canada point of service.

This application form should be completed if you meet the special measures indicated below and wish to apply for a first-time Social Insurance Number, a confirmation of your SIN, or to modify your Social Insurance Number record:

  • Individuals living 100km or more from the nearest Service Canada point of service, in an inaccessible area, or where outreach is very infrequent may apply by mail. To confirm your eligibility to apply by mail, you must verify your postal code.

  • Individuals with other extenuating limitations preventing them from visiting a Service Canada point of service and cannot use the assistance of another individual to submit an application on their behalf may be eligible to apply by mail. Note: Individuals must contact 1-866-274-6627 to determine if they are eligible to apply by mail.

If you are eligible to apply by mail, your application must be accompanied by original proof-of-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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PDF: NAS-2120, 469 KB, printed on 8 pages (8.5x11)

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