Qui facit per alium facit per se

Qui facit per alium facit per se (anglicised Late Latin), which means "He who acts through another does the act himself", is a fundamental legal maxim of the law of agency. It is a maxim often stated in discussing the liability of employer for the act of employee in terms of vicarious liability." According to this maxim, if in the nature of things, the master is obliged to perform the duties by employing servants, he is responsible for their act in the same way that he is responsible for his own acts.

Source: Wikipedia — Qui facit per alium facit per se (CC BY-SA 4.0)