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All of CanadaUpdated April 2026

Data Breaches and Breach Notification

What Canadian law requires when your information is compromised, what businesses must do, and what you can do if you have been affected.

TL;DR

Under PIPEDA, any breach of security safeguards that creates a real risk of significant harm must be reported to the OPC and notified to affected individuals. Alberta, Quebec, and certain health privacy laws have their own notification rules. Records of all breaches must generally be kept for 24 months.

When must a breach be reported

Under PIPEDA, a breach must be reported to the OPC and notified to affected individuals if it creates a real risk of significant harm (RROSH). Factors include:

  • The sensitivity of the information involved.
  • The likelihood the information has been or will be misused.
  • Other relevant factors (e.g., the cause of the breach, who obtained the information).

What notification must contain

Notifications must be conspicuous, given as soon as feasible, and must contain enough information to help you understand the significance of the breach and to reduce the risk or mitigate the harm.

Provincial rules

Alberta PIPA requires mandatory notification to the OIPC since 2010.

Quebec's Law 25 requires notification to the CAI and affected individuals for any confidentiality incident that presents a risk of serious injury.

PHIPA, HIA, HIPA, and similar health-privacy laws have their own notification obligations for custodians.

What you can do if affected

Review the notification carefully and follow any protective steps suggested.

Change passwords and enable multi-factor authentication on affected accounts.

Request a fraud alert on your credit file at Equifax or TransUnion.

File a complaint with the OPC or applicable provincial commissioner if the response was inadequate.

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