Privacy Impact Assessments for Law Firms

The information a law firm holds is uniquely sensitive: solicitor-client privilege attaches to communications that clients shared in confidence, often about the most consequential events in their lives or businesses. Corporate transaction files, litigation strategy, estate documents, and records of individuals navigating family law, criminal proceedings, or immigration matters are not just personal information in the privacy law sense — they carry a professional confidentiality obligation that predates privacy legislation and exists independently of it. When those records are exposed, the harm is not only regulatory. It is a breach of the foundational trust on which the solicitor-client relationship rests.

Law Society guidance across Canadian provinces has been clear: reasonable steps to safeguard client confidentiality are a professional responsibility obligation. Several Law Societies have issued specific guidance on cybersecurity, data management, and the use of cloud platforms for legal files. The standard the guidance describes — understanding how your technology handles client data, having appropriate agreements in place with cloud providers, and maintaining controls proportionate to the sensitivity of what you hold — is precisely what a Privacy Impact Assessment is designed to evaluate.

The threat environment for law firms is not theoretical. Business email compromise in the context of real estate and corporate transactions is a well-documented attack pattern: a compromised account, a fraudulent wire instruction, and funds moved before the fraud is detected. Ransomware that encrypts client files is a recurring incident type across small and mid-size practices. The legal sector's combination of high-value confidential data, lean IT staffing, and extensive use of document-sharing platforms makes it a productive target — and many firms have not assessed where their highest-risk exposures sit.

Privacy Horizon conducts PIAs for law firms that map data flows through the full matter lifecycle — intake, document storage, client communication, third-party disclosure, and file closure — and evaluate where privacy and confidentiality obligations are most at risk. The output is a regulator-aware, Law Society-aligned assessment that your managing partners can act on and your professional responsibility insurer will recognize.

Our approach for Law Firms

We begin by mapping how personal and privileged information flows through your practice management: client intake, matter files, document sharing, third-party disclosure in litigation or transactions, and eventual file closure and secure destruction. Risk identification evaluates each stage against PIPEDA obligations and the professional responsibility expectations articulated in Law Society guidance across Canadian provinces, with particular attention to cloud platforms, email security, and the lateral access risks that make business email compromise so effective against legal environments. The assessment produces a prioritized remediation list and a documented record showing your firm took privacy and confidentiality obligations seriously before an incident occurred.