S.C. Code Ann. § 36-8-312
(1) Any person guaranteeing a signature of an indorser of a certificated security warrants that at the time of signing:
(2) Any person guaranteeing a signature of the originator of an instruction warrants that at the time of signing:
(3) Any person specially guaranteeing the signature of the originator of an instruction makes not only the warranties of a signature guarantor (subsection (2)) but also warrants that at the time the instruction is presented to the issuer: