What term describes someone who acts on behalf of another in a fiduciary capacity?

The term that describes someone who acts on behalf of another in a fiduciary capacity is "fiduciary." A fiduciary is an individual or entity trusted to manage assets or interests for another party, often with a legal or ethical requirement to act in the best interest of the person they represent. This role can involve handling financial matters, legal protocols, or personal affairs, depending on the circumstances.

The fiduciary's responsibilities include loyalty, care, and good faith towards the person being represented, ensuring that decisions made prioritize the beneficiary's welfare. This concept is foundational in many legal and financial contexts, emphasizing the trust placed in the fiduciary to act diligently and responsibly.

In contrast, an executor is appointed to manage the estate of a deceased person according to their will, while an administrator performs similar functions but usually when there is no will. A conservator is responsible for managing the affairs of an individual deemed unable to do so themselves, typically related to health or age. Each of these roles has specific functions, but they do not encapsulate the broader fiduciary responsibilities inherent in the role of a fiduciary.