Indiana Code Title 27. Insurance § 27-5.1-2-29

Sec. 29. (a) A farm mutual insurance company may not waive:

unless the farm mutual insurance company states in a letter or other written or printed document to a policyholder that the farm mutual insurance company intends to specifically waive the term, right, or defense.

(b) A letter or other written or printed document required under subsection (a) must include the signature of an officer or other representative of the farm mutual insurance company who is authorized to execute the particular type of waiver.

(c) A letter or other written or printed document under this section is the only admissible evidence of a waiver by the farm mutual insurance company.