Writ of Mandamus

A writ of mandamus (Latin for "we command") is one of the prerogative writs inherited from English common law. It is issued by a superior court directing a public official, government agency, corporation, or inferior tribunal to perform a specific act that falls within their ministerial duty — that is, a duty so clearly defined by law that no exercise of discretion is involved.

Mandamus is generally available only when three conditions are met: (1) the petitioner has a clear legal right to the act demanded; (2) the respondent has a corresponding legal duty to perform it; and (3) no other adequate legal remedy exists. Courts will not issue mandamus to control discretionary decisions, only to compel action where the law leaves no choice.

In the United States, the writ traces its constitutional significance to Marbury v. Madison (1803), in which Chief Justice John Marshall held that although William Marbury was entitled to his commission, Section 13 of the Judiciary Act of 1789 — which purported to grant the Supreme Court original jurisdiction to issue mandamus — was unconstitutional. The case established judicial review while declining to issue the writ itself. Today, federal mandamus is governed by 28 U.S.C. § 1361 for actions against federal officers, and Federal Rule of Appellate Procedure 21 for appellate use.

In the United Kingdom, the writ was renamed a "mandatory order" under the Civil Procedure Rules reforms of 2000, but functions identically. India preserves mandamus expressly in Articles 32 and 226 of its Constitution, allowing the Supreme Court and High Courts to issue it for enforcement of fundamental rights and other legal duties. Similar instruments exist in Canada, Australia, Pakistan, and other common-law jurisdictions.

Mandamus is distinct from related writs such as certiorari (which quashes a decision), prohibition (which prevents action), habeas corpus (which produces a detained person), and quo warranto (which challenges holding of office). It remains a central tool of administrative law and public accountability.