Executor, Administrator and in some States, Personal Representative all describe the role of a fiduciary, or person trusted to act in the utmost “scrupulous good faith and candor.” An Administrator of an estate is a fiduciary who has been assigned the task of overseeing the proper probate of the estate of a decedent who passed away without a Will, or intestate, whereas an Executor, or Personal Representative, (the term used in some states), is the title of a fiduciary nominated by a decedent who left a Will. Their estate is referred to as testate.