Fiduciary
A fiduciary is a person or entity legally and ethically responsible to advise or make decisions for someone else.
This responsibility is known as a fiduciary duty, which requires the fiduciary to act with honesty, integrity, and loyalty towards the person or entity that they are serving.
With respect to an Estate plan and Probate, these individuals are known as Trustees, Executors, and Powers of Attorney.
They are responsible for managing Assets, making financial decisions, medical decisions, and/or carrying out other duties on behalf of a deceased person.