5 CFR §870.902

1. (a)To assign insurance, an insured individual must complete an approved assignment form. Only the insured individual may make an assignment; no one may assign insurance on behalf of an insured individual.
2. (b)The assignment form must be in writing, signed by the insured individual, and witnessed and signed by 2 people. The completed assignment form, indicating the intent to irrevocably assign all ownership of the insurance, must be received by the appropriate office.
   1. (1)For an employee, the appropriate office is the employing office.
   2. (2)For an annuitant or compensationer, the appropriate office is OPM.