General retainer
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A general retainer of an attorney or solicitor "merely gives a right to expect professional service when requested, but none which is not requested. It binds the person retained not to take a fee from another against his retainer, but to do nothing except what he is asked to do, and for this he is to be distinctly pnid."
Rhode Island Exch. Bank v. Hawkins, 6 ItI. 206.