Client Confidentiality

Client confidentiality is a foundational obligation in regulated professions—law, medicine, accounting, social work, consulting, and increasingly policy advisory work—requiring that information acquired in the course of a professional relationship not be revealed without the client's informed consent. The duty typically attaches from the first substantive consultation, survives termination of the engagement, and in many jurisdictions persists after the client's death.

In legal practice, the duty is broader than the evidentiary attorney-client privilege: privilege shields communications from compelled disclosure in litigation, while confidentiality governs the lawyer's general professional conduct. The American Bar Association's Model Rule 1.6, for instance, prohibits a lawyer from revealing "information relating to the representation" absent consent or a recognized exception. In medicine, the duty traces back to the Hippocratic tradition and is codified through statutes such as the U.S. HIPAA Privacy Rule (2003) and analogous data-protection regimes.

Common exceptions include:

• Client consent, express or implied for the purposes of the representation.
• Prevention of imminent harm, particularly threats of death or serious bodily injury.
• Court orders or statutory reporting duties (e.g., child-abuse reporting, suspicious-transaction reports under anti-money-laundering laws).
• Self-defense exceptions allowing disclosure to respond to allegations against the practitioner or to collect fees.

For think-tank researchers, policy consultants, and Model UN advisors, the duty is usually contractual rather than statutory, enforced through engagement letters, non-disclosure agreements, and institutional ethics codes such as those of the APA, ICC for arbitration, or professional bodies like the CFA Institute. Breaches can trigger disciplinary action, civil liability for breach of fiduciary duty, and reputational damage that effectively ends a practice.

Confidentiality should be distinguished from anonymity (not knowing the source) and privacy (the client's underlying right to control personal information); confidentiality is the professional's correlative duty to honor that right.