S.C. Code Ann. § 38-71-60: Certain acts do not constitute a waiver by insurer.

The acknowledgment of any insurer of the receipt of notice given under any policy covered by this chapter, the furnishing of forms for filing proofs of loss, the acceptance of proofs of loss, or the investigation of any claim thereunder does not operate as a waiver of any of the rights of the insurer in defense of any claim arising under the policy.