4.10 Principal Sued but Not Agent-No Issue as to Agency or Authority is a legal term related to agency law. It is a situation in which a principal is sued, but the agent of said principal is not sued, and there is no issue as to the agency or authority of the agent. This situation may arise when the agent is not considered to be legally responsible for the principal's actions, or when the agent has no knowledge of the principal's actions. There are two types of 4.10 Principal Sued but Not Agent-No Issue as to Agency or Authority: express agency and implied agency. Express agency occurs when a principal has explicitly stated that the agent is authorized to act on behalf of the principal, while implied agency occurs when a principal has not explicitly stated that the agent is authorized to act on behalf of the principal.