Social Insurance Number – After you receive your SIN
5. After you receive your Social Insurance Number (SIN)
Updating your SIN record
To update or request any changes to your SIN record, you will need to provide an original primary document.
- If you are legally changing your name
You will also need a supporting document. By law, you must update your SIN record with your new name due to marriage or other circumstances.
- If you are changing your gender/sex designation
Employment and Social Development Canada (ESDC) no longer requests supporting documentation to change a gender/sex designation in a SIN record.
Providing gender information for a SIN application will soon be optional for adults, children and newborns, as an interim measure. However, until ESDC's computer systems are upgraded to allow a third gender option, "male" or "female" must be selected on the application.
Once your SIN record has been updated, you will receive an updated confirmation of SIN letter. Your previous confirmation of SIN letter or SIN card is no longer valid and should be destroyed in a secure manner.
For more information on how to amend your SIN record, refer to Section 3: What you need before you apply.
It is not necessary to inform us of a change of address unless you are waiting to receive a SIN confirmation letter.
Following a death
When a person dies, there is a risk of someone committing fraud with their SIN. Informing the SIN program of the death reduces the possibility of anyone fraudulently using the SIN.
You are only required to inform the SIN program of a death if the death occurred in one of the territories or outside Canada. Note: If the death occurred in a province, the notification of death is received electronically from the provincial vital statistics agency.
To report a death, you must provide proof of death, such as a Statement of Death from the funeral director or a copy of the death certificate issued by the vital statistics agency, and the SIN of the deceased individual. You may submit the documents in person at your nearest Service Canada Centre or mail them to the following address:
Social Insurance Registration office
Post Office Box 7000
Bathurst, New Brunswick E2A 4T1
When you provide us with this information, the SIN record will be annotated to indicate the person is deceased, but the SIN can still be used for estate purposes.
If you cannot remember the SIN, the legal representative of the estate can make a request to obtain a confirmation of the SIN of the deceased individual. To obtain a confirmation of the SIN of the deceased individual, simply gather all the required original documents and take them to the nearest Service Canada office. If everything is in order, you will get the SIN during your visit and you will not need to part with your documents.
The legal representative of the estate must provide the following documents:
- the original death certificate;
- the deceased persons original proof of identity documents (primary document and, if applicable, supporting document);
- proof that the legal representative is authorized to represent the estate (original document or certified copy); and
- the SIN of the legal representative of the estate or an original, primary proof of identity document if he or she does not have a SIN.
Lost or stolen SIN
If your confirmation of SIN letter or SIN card was lost or stolen, Service Canada will not issue a new SIN. If you don't remember your SIN, you can refer to your income tax return where your SIN can be found or you can request a confirmation of your SIN. For more information on how to obtain a confirmation of your SIN, refer to Section 3: What you need before you apply.
A new SIN may be issued only in situations where there is a proof that the SIN was used fraudulently.
Finding someone else’s SIN
If you find a confirmation of SIN letter or SIN card, return it immediately to a Service Canada office or mail it to the following address:
Social Insurance Registration Office
PO Box 7000
Bathurst, New Brunswick E2A 4T1
Requesting your SIN information
To obtain a confirmation of your SIN, simply gather all the required original documents and take them to the nearest Service Canada office. If everything is in order, you will get your SIN during your visit and you will not need to part with your documents.
The Privacy Act gives individuals living in Canada the right to access and correct personal information about them held by various federal government organizations. This means you can ask for information about your SIN record held in the Social Insurance Register.
To request copies of SIN application form(s) you have previously submitted:
- Complete the Personal Information Request form (TBC/CTC 350-58) and indicate on the form that you are requesting these copies under the Privacy Act, Bank ESDC PPU 390.
- You also need to provide your original document(s).
- Send your completed form and original document(s) to:
Employment and Social Development Canada
Access to Information and Privacy Coordinator
P.O. Box 12000
Fredericton, New Brunswick E3B 5G4
If you wish to request personal information pertaining to another individual under the Privacy Act and Regulations, you must either be:
- a representative defined as “a guardian, curator, committee, executor administrator or other legal representative’’;
- a lawyer, trustee or individual who has power of attorney for the individual; or
- able to provide a consent form filled out by the individual.
Protecting your SIN
Read the information on protecting your SIN and what you should do if you suspect someone is using your SIN.
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