Recently, there has been an issue for international students applying for a social insurance number for working on campus. Particularly affected are many international students who will be working as teaching assistants.
Below are the criteria to be used to obtain a SIN if a student wishes to work on campus:

Confirmation of employment on campus:
• Must be original
• Must use the college or university letterhead
• Must indicate that the work is located on campus
• Must include the employer’s name and telephone number
• Must be signed by the university or college official
• Must include the student’s name

Proof of full-time post-secondary enrollment:
• May be original or in an electronic format
• Must use the university or college letterhead
• Must include the student’s name

Note: The confirmation of employment on campus and the proof of enrollment may be included in the same document.