Nothing in sections 523.01 to 523.24 limits any rights the principal may have against the attorney-in-fact for any fraudulent or negligent actions in executing affidavits or signing or acting on behalf of the principal as an attorney-in-fact. An attorney-in-fact who knowingly executes a false affidavit or, knowing that the conditions of section 523.18 are not satisfied, signs on behalf of the principal is liable for treble the amount of damages suffered by the principal.