S.C. Code Ann. § 15-77-10: Persons appointed by United States may prosecute in its behalf.

Every person authorized and appointed by the United States for the purpose, in its name and in its behalf, may commence and prosecute to final decree, judgment and execution any action for the recovery from individuals of debts due and effects belonging to the United States. Every such action shall be conducted in the same manner and subject to the same rules and regulations as when commenced by one citizen of this State against another citizen thereof, and the defendant shall be allowed the same privileges and advantages as he would be entitled to if sued by a citizen of this State.