text: Qui tam is an abbreviation of the Latin phrase qui tam pro domino rege quam pro se ipso in hac parte sequitur , meaning Who sues on behalf of the King as well as for himself. Such actions are brought by an informer or relator. Usually, these cases are filed under some statute which establishes a penalty for particular violations, and monetary damages are split between the relator and the state or other institution. In popular parlance, these relators are known as whistle-blowers.