5 CFR §1690.15

1. (a)The TSP record keeper may freeze (e.g., place an administrative hold on) a participant's account for any of the following reasons:
   1. (1)Pursuant to a qualifying retirement benefits court order as set forth in part 1653 of this chapter;
   2. (2)Pursuant to a request from the Department of Justice under the Mandatory Victims Restitution Act;
   3. (3)Upon the death of a participant;
   4. (4)Upon suspicion or knowledge of fraudulent account activity or identity theft;
   5. (5)In response to litigation pertaining to an account;
   6. (6)For operational reasons (e.g., to correct a processing error or to stop payment on a check when account funds are insufficient);
   7. (7)Pursuant to a written request from a participant made in the manner prescribed by the TSP record keeper; and
   8. (8)For any other reason necessary to ensure the integrity of TSP accounts or compliance with law.
2. (b)[Reserved]