S.C. Code Ann. § 20-7-1129 – Contesting validity of income withholding order; notice

(A) An obligor may contest the validity or enforcement of an income withholding order issued in another state and received directly by an employer in this State in the same manner as if the order had been issued by a tribunal of this State.
(B) The obligor shall give notice of the contest to:
1. (1) a support enforcement agency providing services to the obligee;
2. (2) each employer which has directly received an income withholding order; and
3. (3) the person or agency designated to receive payments in the income withholding order; or if no person or agency is designated, to the obligee.
  PART IV. REGISTRATION OF FOREIGN SUPPORT ORDERS