If the principal is undisclosed , the third party does not know that the agent is acting on behalf of a principal . Under general contract law principles
A. The third party can sue the agent of the undisclosed principal personally, and vice versa .
B. The undisclosed principal will be able to enforce a contract involving credit extended by third parties .
C.The undisclosed principal cannot ordinarily sue or be sued upon the contract made on his or her behalf .
D. After the third party discovers the identity of the principal , only the agent is liable.