Tennessee Code Title 56. Insurance § 56-7-1902

(a) Unless the nonrenewal notice contains a reason for the nonrenewal action, the notice shall advise the insured that upon written request of the named insured, mailed or delivered to the insurer not later than fifteen (15) days after the effective date of the nonrenewal, the insurer will within twenty (20) days mail to the named insured a written statement specifying a reason for the nonrenewal action.

(b) There shall be no liability on the part of, and no cause of action of any nature shall arise against, any insurer, its authorized representative, its agents, its employees, or against any firm, person or corporation furnishing information to the insurer, as to the reason for nonrenewal.