The SIN is a nine digit number that you need to work in Canada. Without it, Queen's cannot pay you. You must have valid immigration status in Canada to apply for a SIN. There is no fee for the SIN.
It normally takes about 10 business days from the date of your application to receive the SIN card in the mail. If you need the number immediately to get paid, explain that you need the SIN for payment of salary. If your documentation is in order, you'll get a Social Insurance Number on the spot, contained in a letter entitled "Acknowledgement of Application for SIN".
If your SIN has expired:
If your SIN starts with a 9 it will have an expiry date. Click here to find out how to reapply. There is no cost for a new SIN.