Where the principal by his conduct or statement willfully induces another person to believe that a certain person is his agent, the principal is estopped from denying the fact of agency
An agent has authority to do all such acts as would be done by a person of ordinary prudence in his own case for the purpose of protecting the principal from loss in an emergency
Where a person acts for some one without his knowledge and the other person subsequently ratifies the act, agency by ratification arises and the ratifier is bound as if he had expressly authorised the person to do the act on his behalf
An agent has authority to do every lawful thing which is necessary for the purpose of conducting such business, as is usually done in the ordinary course of conducting that business.
An agent has authority to do such acts as would be done by a person of ordinary prudence, for the purpose of protecting the principal from loss, under similar circumstances.
The general rule is that an agent cannot appoint an agent (delegatus non potest delegare), meaning an agent cannot further delegate their duties to another.
A person appointed by the agent to act for the principal, in the business of agency, with the knowledge and consent of the principal. This is not a sub-agent.
Duties of the agent in selecting a substituted agent
The agent is bound to exercise the same amount of discretion in selecting such agent for his principal as he would exercise in his own case, and if he does not do so, he is responsible to the principal for the acts or negligence of the agent so selected.