Liability for another's act is a complex triangle between person liable, dependent and subordinated tortfeasor and innocent victim. It is difficult to explain the ground of liability which will satisfy their opposing interests without contradiction. In French law, this is a strict liability, but the fault of an employee is required as a condition. In Germanic systems, it starts from the employer's fault, but the court has adapted old written rules to modern social needs by creative application of law. In Serbian law, regulations are interpreted in four different ways. The author tried to identify the origins of confusion, relying on the basic Tort law notions such as fault and wrongfulness. However, fault itself is defined in two ways: as a mental state or as behavior. Regarding wrongfulness, sometimes it is enough to violate professional rules, the second time an attack on a legal prohibition prescribed by the law is required. Nevertheless, there is a solution to the problem that merges Law of Obligations with Labor Law.