28 U.S. Code § 1696. Service in foreign and international litigation

The district court of the district in which a person resides or is found may order service upon him of any document issued in connection with a proceeding in a foreign or international tribunal. The order may be made pursuant to a letter rogatory issued, or request made, by a foreign or international tribunal or upon application of any interested person and shall direct the manner of service. Service pursuant to this subsection does not, of itself, require the recognition or enforcement in the United States of a judgment, decree, or order rendered by a foreign or international tribunal.
This section does not preclude service of such a document without an order of court.