Social Insurance Number
If you are a newcomer to Canada or a temporary resident, you need to apply for a Social Insurance Number (SIN). When you apply, you will receive a wallet-sized card with a 9-digit number (your unique SIN). You need this number in order to work in Canada or to have access to government programs and benefits.
Your SIN is for you alone. It cannot legally be used by anyone else. Keep your SIN card in a safe place. Do not carry it with you. You should provide your SIN only to authorized parties (such as your employer, your bank, or government agencies).
You may apply for a SIN at your nearest Service Canada Centre. Be sure to bring a document that proves your identity and status in Canada. You may also apply by mail.
To learn about the SIN, apply for a SIN, learn about documentation needed, or find a Service Canada Centre near you, visit www.servicecanada.gc.ca.