(a) Any employer or his or her designated agent who discloses job-related information that may be reasonably considered adverse about a former or current employee to a prospective employer of the former or current employee is presumed to be acting in good faith and is immune from civil liability for the disclosure or its consequences: Provided, That the disclosure of such information pursuant to this subsection shall be in writing and a copy of any such disclosure shall be provided to the former or current employee at the time of disclosure.
(b) For the purposes of this section, the presumption of good faith is rebutted upon a showing, by a preponderance of the evidence, that the information disclosed was:
(1) Knowingly false;