Social insurance numbers
The Social Insurance Number (SIN) is a confidential number that is restricted to income reporting purposes. It is a key piece of information about an individual that, if it falls into the wrong hands, can lead to identity theft.
Certain government departments and programs are authorized to collect and use the SIN and some private-sector organizations are required by law to request it; however, the SIN should not be used as a general identifier.
On this page, you will find advice for individuals and guidance for organizations about the rules that exist to protect the SIN.
Find out who is authorized to ask for your SIN, and what you can do if others request that you provide the number.
Find information for businesses about how PIPEDA applies to the collection, use and disclosure the SIN.
Access links to investigations of businesses conducted by OPC into issues related to SIN.
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