Damaged, forgotten or lost Social Insurance Number
Damaged Social Insurance Number card
Service Canada no longer issues plastic Social Insurance Number (SIN) cards.
If your SIN card is damaged but you know your SIN, you do not need to take any action.
Find or get a copy of your SIN online
If you need to access your SIN, you can view and print it by signing in or registering for My Service Canada Account (MSCA).*
*To use MSCA, your SIN must be valid. If you are a temporary resident and your SIN begins with 9, you need to extend it if it has expired. Follow the steps in SIN for temporary residents in Canada.
If you can't remember your SIN
You can find your SIN on documents such as:
- your income tax return
- tax slips (for example, a T4)
- your Record of Employment
- a Registered Retirement Saving Plan (RRSP) contribution receipt
If you can't find your SIN or your child's SIN
You can apply for a Confirmation of SIN. This process is the same as applying for a first-time SIN and you will need to provide all required documents.
This confirms an existing SIN. A new number will not be issued.
If you find someone else's SIN
If you find a SIN card or Confirmation of SIN letter, please return it to a Service Canada Center or mail it to:
Service Canada
Social Insurance Registration Office
PO Box 7000
Bathurst, NB E2A 4T1
Canada
Stolen SIN or suspected fraud
A new SIN may be issued only if there is clear evidence that your current SIN has been used fraudulently. If you believe this applies to you, see SIN fraud or data breach for more information.