5 C.F.R. § 831.2006 Designation of agent by next of kin.
Title 5 - Administrative Personnel
When a deceased employee, Member, or annuitant has not named a beneficiary and one of the next of kin entitled makes a claim for lump-sum benefit, other next of kin entitled to share in the lump-sum benefit may designate the one who made the claim to act as their agent to receive their distributive shares.
Title 5: Administrative Personnel
PART 831—RETIREMENT
Subpart T—Payment of Lump Sums
§ 831.2006 Designation of agent by next of kin.

