Quo Warranto

Quo warranto (Latin for "by what warrant") is a common-law writ and, in modern systems, a statutory remedy used to test whether a person lawfully occupies a public office or exercises a franchise. The court effectively asks the respondent: by what authority do you hold this position? If the respondent cannot show valid legal title, the office is declared vacant or the franchise revoked.

The writ originated in medieval England, formalized under the Statute of Gloucester (1278) by Edward I to investigate liberties claimed by feudal lords. It evolved from a royal prerogative tool into a remedy available to private parties and government officers, and survives today in many common-law jurisdictions, including the United States, the United Kingdom (largely replaced by judicial review), India, the Philippines, and Canada.

Typical modern uses include:

• Challenging the eligibility of an elected or appointed official (citizenship, age, residency, qualifications).
• Removing usurpers from public office.
• Contesting a corporation's continued exercise of a charter or franchise.
• Testing the validity of an appointment to a constitutional body.

In India, quo warranto is one of the five writs available under Article 32 (Supreme Court) and Article 226 (High Courts) of the Constitution. Indian courts have used it, for example, in University of Mysore v. C.D. Govinda Rao (1964) to examine appointments to public posts. In the Philippines, the Supreme Court controversially used a quo warranto petition in 2018 to remove Chief Justice Maria Lourdes Sereno, bypassing impeachment.

In the United States, quo warranto is governed by federal and state statutes; standing is usually limited to the attorney general or, with leave, a person with a direct interest. The remedy is generally unavailable to challenge purely legislative or executive policy decisions — it targets the title to office, not the exercise of its powers.