There are several key responsibilities an agent has with respect to the principal. This includes the duty of loyalty, duty to act in ance with the express and implied terms of a contract, duty of care competence, and diligence, duty of good conduct, and duty to comply with the principal's lawful instructions.
A person is always liable for her own torts, so an agent who commits a tort is liable; if the tort was in the scope of employment the principal is liable too. Unless the principal put the agent up to committing the tort, the agent will have to reimburse the principal.
A principal can be held directly liable for their agent's tortious conduct when their agent is acting with actual or true authority on the principal's behalf.
A principal can also be held vicariously liable - or indirectly liable - for their agent's tortious conduct. In this context, the agent is not acting with actual authority when committing the tort, so it is not as if the principal itself committed the tort.
Similarly, if the agent or principal loses capacity to enter into an agency relationship, it is suspended or terminated. The agency terminates if its purpose becomes illegal. Even though authority has terminated, whether by action of the parties or operation of law, the principal may still be subject to liability.
Tort liability is predicated on the existence of proximate cause, which consists of both: (1) causation in fact, and (2) foreseeability. A plaintiff must prove that his or her injuries were the actual or factual result of the defendant's actions.
A principal can be directly liable for the agent's actions when the agent is acting with actual or true authority on the principal's behalf, or the agent's conduct is ratified by the principal. Restatement (3d) of the Law of Agency, § 7.03; Restatement (3d) of the Law of Agency, § 7.04; Court Opinions.
An agent is liable to a principal when he/she acts without actual authority, but with apparent authority. An agent is liable to indemnify a principal for loss or damage resulting from his/her act. A principal owes certain contractual duties to his/her agent.
Additionally, principals can be held liable for the torts of their agents under the doctrine of vicarious liability. A principal is always liable for torts committed while the agent completes their official responsibilities.