A major party to a transaction, such as a seller or purchaser of property, remains anonymous. . Person is not informed by an agent that there is a principal. In this case, the agent has legal ability under the contract.
A situation in which a third person is not advised of the existence of an agency relationship and, thus, is unaware that a principal-agent relationship exists. The unknown person for whom the agent is acting is referred to as an undisclosed principal. If an undisclosed principal exists, the agent is personally liable under the contract.