United States v. Barry Fischer Law Firm, LLC, Civ. A. No. 10-7997 (S.D.N.Y. Jan. 5, 2011). Where the plaintiff sought to serve a summons and complaint on Brazil in an interpleader action, and where the Inter-American Convention on Letters Rogatory required service via letter rogatory, 28 U.S.C. § 1608 requires the plaintiff to attempt service via letter rogatory before resorting to alternate methods of service.