28 U.S.C. § 2361 Process and procedure
In any civil action of interpleader or in the nature of interpleader under section 1335 of this title, a district court may issue its process for all claimants and enter its order restraining them from instituting or prosecuting any proceeding in any State or United States court affecting the property, instrument or obligation involved in the interpleader action until further order of the court. Such process and order shall be returnable at such time as the court or judge thereof directs, and shall be addressed to and served by the United States marshals for the respective districts where the claimants reside or may be found. Such district court shall hear and determine the case, and may discharge the plaintiff from further liability, make the injunction permanent, and make all appropriate orders to enforce its judgment.