S.C. Code Ann. § 62-2-502: Execution.

Except as provided for writings within Section 62-2-512 and wills within Section 62-2-505, every will shall be:

(1) in writing;

(2) signed by the testator or signed in the testator's name by some other individual in the testator's presence and by the testator's direction; and

(3) signed by at least two individuals each of whom witnessed either the signing or the testator's acknowledgment of the signature or of the will.