A Florida single agent owes the principal all duties EXCEPT:

Loyalty is a fundamental fiduciary duty owed by a Florida single agent to their principal. This duty requires the agent to act in the principal's best interests, avoiding conflicts of interest and prioritizing the principal's goals above all others. Since loyalty is a core duty of single agency representation, it cannot be the correct answer to this question.

Confidentiality is another essential fiduciary duty that a Florida single agent owes to their principal. This duty requires the agent to keep all information about the principal confidential unless authorized to disclose it or required by law. As confidentiality is a mandatory duty in single agency, it cannot be the exception mentioned in the question.

Full disclosure is a critical duty that Florida single agents must perform for their principals. This duty requires the agent to disclose all material facts that could affect the transaction or influence the principal's decisions. Since full disclosure is an obligation in single agency relationships, it cannot be the exception to the duties owed by a single agent.