S.C. Code Ann. § 20-7-1690
(A) Consent or relinquishment for the purpose of adoption is required of the following persons:
(4) the father of a child born when the father was not married to the child's mother, if the child was placed with the prospective adoptive parents more than six months after the child's birth, but only if the father has maintained substantial and continuous or repeated contact with the child as demonstrated by:
(c) regular communication by the father with the child or with the person or agency having lawful custody of the child, when the father is physically and financially unable to visit the child, or when the father is prevented from visiting the child by the person or agency having lawful custody of the child.
The subjective intent of the father, if unsupported by evidence of the acts specified in subitems (a), (b), and (c) of this item (4) of subsection (A) of this section, does not preclude a determination that the father failed to maintain substantial and continuous or repeated contact with the child. In making this determination, the court may not require a showing of diligent efforts by any person or agency having lawful custody of the child to encourage the father to perform the acts. A father of a child born when the father was not married to the child's mother, who openly lived with the child for a period of six months within the one-year period immediately preceding the placement of the child for adoption, and who during the six-months period openly held himself out to be the father of the child is considered to have maintained substantial and continuous or repeated contact with the child for the purpose of this item (4) of subsection (A) of this section; or
(5) the father of a child born when the father was not married to the child's mother, if the child was placed with the prospective adoptive parents six months or less after the child's birth, but only if:
(B) Consent or relinquishment for the purpose of adoption is required of the legal guardian, child placing agency, or legal custodian of the child if authority to execute a consent or relinquishment has been vested legally in the agency or person and:
(F) Under no circumstances may a child-placing agency or any person receive a fee, compensation, or any other thing of value as consideration for giving a consent or relinquishment of a child for the purpose of adoption and no child-placing agency or person may receive a child for payment of such fee, compensation, or any other thing of value.
(7) reasonable fees to sending agencies as defined in Section 20-7-1980( 2)(b), the Interstate Compact on the Placement of Children.
The court may approve an adoption while not approving unreasonable fees and costs.
However, costs may be assessed and payment made, subject to the court's approval, for the following: