None of the following acts by or on behalf of an insurer shall be deemed to constitute a waiver of any provision of a policy or of any defense of the insurer thereunder:

(a) Acknowledgment of the receipt of notice of loss or of claim under the policy.

(b) Furnishing forms for reporting a loss or claim, for giving information relative thereto, or for making proof of loss, or receiving or acknowledging receipt of any such forms or proofs completed or uncompleted.

(c) Investigating any loss or claim under any policy or engaging in negotiations looking toward a possible settlement of any such loss or claim.