Fiduciary
In English common law , the fiduciary relation is an important concept within a part of the legal system known as equity . In the United Kingdom , the Judicature Acts merged the courts of equity ( historically based in England's Court of Chancery ) with the courts of common law , and as a result the concept of fiduciary duty also became applicable in common law courts . 
<triplet> Court of Chancery <subj> courts of equity <obj> instance of