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All of CanadaUpdated April 2026

Personal Data Breach Response Checklist

Printable checklist to help you respond quickly after receiving a breach notification.

TL;DR

Use this checklist in three phases: immediate (hour 0-24), follow-up (day 1-7), and long-term monitoring. Covers passwords, MFA, fraud alerts, credit monitoring, and legal options.

Hour 0-24 checklist

Confirm each item:

  • Read the breach notification and identify what data was exposed.
  • Change the password for the affected account and any account using the same password.
  • Enable multi-factor authentication (MFA) on affected accounts.
  • Call your bank and credit card companies if financial data was involved.
  • Take a screenshot of the breach notification and save it.
  • Save the notification email in a dedicated folder.

Day 1-7 checklist

Follow-up actions:

  • Place a fraud alert on your Equifax credit file (equifax.ca).
  • Place a fraud alert on your TransUnion credit file (transunion.ca).
  • Sign up for any free credit monitoring offered by the breached organization.
  • Order a free credit report from both bureaus and review for unauthorized activity.
  • If you see suspicious activity, report to the Canadian Anti-Fraud Centre (1-888-495-8501).
  • If fraud has occurred, file a police report and get a case number.

Long-term monitoring

For the next 12-24 months:

  • Check credit card and bank statements monthly.
  • Watch for new account notifications.
  • Renew fraud alerts annually (they typically expire after 12 months).
  • Keep records of all time and expenses related to the breach (may be recoverable in a class action).

Legal follow-up

If the organization's response is inadequate, file a complaint with the OPC or applicable provincial commissioner.

Watch for class actions related to the breach. Check CanLII for certified classes.

Consider consulting a privacy lawyer if damages are significant.

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