Quo Warranto Definition:

Latin: by what authority?

A challenge to a person allegedly improperly asserting a right to hold a public office.

The writ seeks to disenfranchise on the record a person or organization from doing something for which it may not have the legal authority, by demanding to know by what right they exercise the controversial authority.

Challenging a person's right to hold a public office.

As with the related remedies of mandamus, certiorari and prohibition, these remedies have been displaced by many jurisdictions and replaced by more generic-named tools such as injunctions or judicial review.