S.C. Code Ann. § 38-57-110: Coercion of business by sellers or lenders prohibited.

(1) No lender, vendor, or person engaged in selling real or personal property or the financing thereof or the lending of money on the security thereof, and no trustee, agent, officer, or other employee of any such person, may require, as a condition precedent, concurrent, or subsequent to the sale or financing the purchase of such property or to lending money upon the security of a mortgage thereon or as a condition precedent, concurrent, or subsequent for the renewal or extension of the loan or mortgage, that the purchaser or borrower negotiate a policy of insurance or renewal thereof covering the property through a particular insurer or agent.

(2) This section does not prevent a mortgagee, real or chattel, of the right to designate reasonable financial requirements of the insurer and adequacy of the terms and provisions of the coverage with respect to the property pledged or mortgaged. A requirement that the insurer providing coverage be a particular type of insurer is not considered a reasonable financial requirement, if the insurer issues nonassessable policies and otherwise meets reasonable financial requirements.