The acknowledgment by an insurer of the receipt of notice given under any policy covered by sections 62A.01 to 62A.09 hereof, or the furnishing of forms for filing proofs of loss, or the acceptance of such proofs, or the investigation of any claim thereunder shall not operate as a waiver of any of the rights of the insurer in defense of any claim arising under such policy.
Minn. Stat. § 62A.07
1967 c 395 art 3 s 7