5 C.F.R. § 294.111
(a) The Chief, Plans and Policies Division, Administration Group, OPM, has official custody of OPM records. A subpoena or other judicial order for an official record from OPM should be served on the—
Chief, Plans and Policies Division, Office of Personnel Management, 1900 E Street NW., Washington, DC 20415
[54 FR 25094, June 13, 1989, as amended at 57 FR 32150, July 21, 1992]