Effective July 22, 1998, FEGLI benefits must be paid in accordance with the terms of a valid court order, regardless of whether you actually complete a designation of beneficiary form (link to designation of beneficiary page) complying with the court order.
The court order supersedes any of your prior designations. When such a court order is in effect, you cannot validly change your designation or make a new designation, unless the person(s) named in the court order agree(s) in writing or unless the court order is subsequently modified.