In most U.S jurisdictions, the service of a summons is in most cases required for the court to have jurisdiction over the party who is being hauled into court involuntarily. The process by which a summons is served is called service of process. The form and content of service in the Federal system is governed by the Federal Rules of Civil Procedure, and the rules of many state courts are similar. The federal summons is usually issued by the Clerk of the Court, in many states the summons may be issued by an attorney, though some states use filing as the means to commence an action and the summons must be filed in those cases in order to be effective. Other jurisdictions may only require that the summons be filed after it is served on the defendants. Rule 4 of the Federal Rules of Procedure governs summonses and the manner in which they are served.