Fiduciary: This refers to a person (or entity) that serves in a representative capacity. Personal representatives, trustees, guardians, conservators, and agents under powers of attorney are all fiduciaries. A fiduciary stands in a position of confidence and trust with respect to each heir, devisee, and/or beneficiary. They are subject to a responsibility to act in the best interests of the person that they are serving on behalf of and can be sued if they act improperly.