fiduciary

Relating to an entity that owes to another good faith, accountability and trust, often in the context of trusts and trustees.

a fiduciary contract

a fiduciary duty

Pertaining to paper money whose value depends on public confidence or securities.

Indeed, currency would be more effective for not being gold and silver but fiduciary paper money.

Accepted as a trusted reference such as a point, value, or marker; fiducial.

One who holds a thing in trust for another.

“We focus on sustainability not because we’re environmentalists, but because we are capitalists and fiduciaries to our clients,” Mr. Fink wrote.

One who depends for salvation on faith, without works; an antinomian.