Social Insurance Number (SIN)

When applying for your SIN, you must have the following important pieces of information:

If you have a Work permit (Off-Campus/Post Graduation):

• Your valid passport (NOT a photocopy)
• Your valid Study Permit
• Your Work Permit

If you do not have a Work Permit and wish to work on-campus:

• Your valid passport (NOT a photocopy) with your valid Study Permit inside
• A letter of contract of employment from your on campus employer which states the following mandatory fields:
  • Gender of the student
  • Date of birth of the student
  • Surname, Given Name of the student
  • Study Permit Document Number
  • Date the Study Permit was signed
  • Date of expiry of the Study Permit
  • Name of the On-Campus Department or On-Campus Business hiring the student
  • Employer’s Name
  • Civic address where the work will be performed
  • Employer’s Signature
  • Employer’s Telephone number
  • Contact of employment, which must show the start and end date of employment and these dates, must fall within the study permit dates.
  • Employee’s Start and end dates of employment
  • Signature of student and Date signed

The contract of employment must be printed on Employer’s letterhead.
http://www.servicecanada.gc.ca/eng/sin/employers/contract.shtml  

More related information can be found from Service Canada website:
http://www.servicecanada.gc.ca/eng/sc/sin/index.shtml

This information can be taken to (apply in person):

Service Canada office in St Catharines
Henley Square
395 Ontario Street
St Catharines, ON, L2N 7N6
Telephone: 1 800 206 7218
Hours: Monday to Friday 8:30 am – 4:00 pm

Information on expiry date if SIN begins with "9"