S.C. Code Ann. § 47-3-540

Animal control officers must not destroy any positively identifiable dog until they have notified the owner at his last known address by registered mail that they have the dog in their possession. The owner must notify the animal control officer within two weeks that he will pick up his dog. If the owner does not pick up his dog within two weeks of notification to the animal control officer, the dog may be destroyed. Reasonable costs associated with the above extended holding period, including cost of mailing the required notice, must be paid before the dog is returned to its owner, or the owner's designee, in addition to any other established costs, fines, fees, or other charges.