legal representative

noun2

1. •
   A lawyer, solicitor, etc, who acts on behalf of a client in legal matters.
2. •
   One who represents or acts on behalf of another under authority recognised by law, such as a parent or guardian of a minor, a manager of a legal person, etc.

   • A person who is not capable of contracting or who has limited capacity to contract can neither establish nor terminate residence without the consent of his legal representative. — 2013