5 CFR 1651.8: Participant's estate.

If the account is to be paid to the duly appointed executor or administrator of the participant's estate under § 1651.2(a)(5), the following rules apply:

(a) Appointment by court. The executor or administrator must provide documentation of court appointment.

(b) Appointment by operation of law. If state law provides procedures for handling small estates, the TSP record keeper will accept the person authorized to dispose of the assets of the deceased participant under those procedures as a duly appointed executor or administrator. Documentation which demonstrates that the person is properly authorized under state law must be submitted to the TSP record keeper.