S.C. Code Ann. § 40-57-140
(A) A real estate broker and all associated licensees owe no duty or obligation to a client following termination, expiration, completion, or performance of an agency agreement or closing of the real property transaction, whichever occurs first, except the duties of:
(2) keeping confidential all information received during the course of the engagement which was made confidential by request or instructions from the client, except as provided for in Sections 40-57-137(C)(6) and 40-57-137(H)(6) unless: