A data breach at a Canadian accounting firm triggers PIPEDA breach notification obligations and potential OPC investigation. Most small firms have no plan — and several active vulnerabilities.
Since 2018, PIPEDA has required organizations to report breaches to the Office of the Privacy Commissioner of Canada when the breach creates a real risk of significant harm. Accounting firms handle social insurance numbers, tax returns, banking information, and corporate financials — exactly the categories that create that risk.
Four gaps we find in most small firms
- Email document exchange. T4s, SINs, and bank statements sent via unencrypted email. If either party's account is compromised, the data is exposed.
- Shared drives without access controls. A Google Drive folder accessible to every employee, including former staff whose access was never revoked.
- No multi-factor authentication. QBO, email, and CRA My Accounts accessed with passwords only — one successful phishing attack exposes everything.
- No breach response plan. When a breach occurs, you need to know within 24 hours: what data was exposed, who to notify, and how to contain it.
Quick wins that reduce risk today
Enable MFA on all cloud accounts. Revoke access for former staff immediately. Move sensitive file exchange to an encrypted portal (ShareFile, TaxDome, or Karbon's client portal). Draft a one-page breach response plan that names who is responsible for what in the first 24 hours. None of these require significant budget — they require discipline.
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