Adult guardian refers to a person appointed by a probate or surrogate court to perform court-ordered tasks of caring for an incapacitated adult's financial affairs and personal needs. Guardians can be appointed for a specific purpose. For example, a plenary guardian or Guardian of the person or Guardian of the estate. A plenary guardian has total authority over personal and property matters of the incapacitated adult. A Guardian of the person has authority only over personal matters such as medical decisions and residential questions. A Guardian of the estate has authority over property only.