5 C.F.R. § 1653.31
(b) As used in this subpart:
Criminal restitution order means a complete copy of a judgment in a criminal case issued by a federal court ordering restitution for a crime under 18 U.S.C. 3663A.
Enforcement letter means a letter received from the Department of Justice requesting a payment from a participant's TSP account to enforce a criminal restitution order.
[79 FR 53604, Sept. 10, 2014, as amended at 80 FR 52605, Sept. 1, 2015]