What is a Writ of Quo Warranto?

A Writ of Quo Warranto, meaning "by what authority," is a judicial tool used to challenge a person’s right to hold a substantive public office.

Unlike most legal remedies, any citizen can file this petition, even if not personally aggrieved, to ensure public positions aren't occupied illegally.

The court conducts a "judicial audit" of the appointee's eligibility, acting as a safeguard against nepotism or the "usurpation" of power in offices created by the Constitution or a statute. The writ is issued only when the office is of a public nature and the appointment violates mandatory legal requirements.

If the court finds the appointment invalid, the office is declared vacant and holder is ousted.