For purposes of this chapter and chapter 61 of this title, the term “fiduciary” means—

((1)) a person who is a guardian, curator, conservator, committee, or person legally vested with the responsibility or care of a claimant (or a claimant’s estate) or of a beneficiary (or a beneficiary’s estate); or

((2)) any other person having been appointed in a representative capacity to receive money paid under any of the laws administered by the Secretary for the use and benefit of a minor, incompetent, or other beneficiary.