OEO must be advised of the payment of any reward monies to Witness Security Program participants. The appropriate investigative agency headquarters must provide a written report of such payments reflecting the reason(s) for the payment and the fact that the prosecuting attorney has approved the payment. Payments to relocated witnesses must be sent to the Chief, Witness Security Program, Judicial Security Division, U.S. Marshals Service, 600 Army/Navy Drive, Arlington, Virginia 22202-4210. Payments to prisoners must be sent to the Assistant Administrator, Inmate Monitoring Section, Bureau of Prisons, 320 First Street, N.W., Room 524, Washington, D.C. 20534.