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Duty of confidentiality


In common law jurisdictions, the duty of confidentiality obliges solicitors (or attorneys) to respect the confidentiality of their clients' affairs. Information that solicitors obtain about their clients' affairs may be confidential, and must not be used for the benefit of persons not authorized by the client. Confidentiality is a prerequisite for legal professional privilege to hold.

The lawyer-client relationship has historically been characterised as one of confidence. This duty also constitutes part of the broader foundation for lawyer's fiduciary duties to their clients.

The maintenance of full and frank disclosure between lawyers and their clients is the main justification for the duty of confidentiality. The basis for this rationale is utilitarianism, in that it works to promote the work of solicitors, who are officers of the court. It allows clients to freely discuss intimate details without fear that such information could be subsequently disclosed to the general public. In turn, public confidence in lawyers and the legal system is maintained and promoted. Further, the duty of confidentiality is a constant reminder to lawyers of the loyalty they owe to their clients.

Another rationale is to protect the human dignity of the client.

In criminal cases, confidentiality is also justified to prevent the use of tricked confessions or admissions.

The duty is sourced from a combination of contract law and equity arising from the distinctive relationship between lawyer and client. The solicitor or attorney is an agent of the client under the law of agency. In contract, the duty arises from terms contained in the retainer agreement. Complementarily, equity prohibits unauthorised use or disclosure of confidential information. In most jurisdictions, the duty is codified in the terms of legal professional rules, such as the Model Code of Professional Responsibility.


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