S.C. Code Ann. § 20-7-1734
(B) The following persons or agencies are entitled to notice as provided in subsection (A) of this section:
(E) Notice given pursuant to this section must include notice of the following:
(3) failure to file a response within thirty days of receiving notice constitutes consent to adoption of the child and forfeiture of all rights and obligations of the person or agency with respect to the child.
When notice of intent to contest, intervene, or otherwise respond is filed with the court within the required time period, the person or agency must be given an opportunity to appear and to be heard before the final hearing on the merits of the adoption.
Petitioners must be notified by the court of notice and reasons to contest, intervene, or otherwise respond, and petitioners also must be given the opportunity to be represented or to appear and to be heard at any hearing held relating to the adoption.