fiduciary relation

1. "Fiduciary: one, such as an agent of a principal or a company director, that stands in a special relation of trust, confidence, or responsibility in certain obligations to others."
   “受信托人：处于资本代理人或公司董事这一位置上的人，在某些合约上对其他人有某种特殊的信托、信任或责任的关系。”

noun

1. the legal relation that exists when one person justifiably places reliance on another whose aid or protection is sought in some matter