S.C. Code Ann. § 12-2-40

All contracts that are entered into with intent to evade payment of taxes or in fraud of the tax laws of this State are against public policy. The courts of this State may not lend their aid to enforce a contract entered into as a substitute for, or having as its consideration, a previous contract declared to be against public policy. Nothing in this section limits the power of an individual to administer his property by contract or donation so as to manage or avoid the impact of this or other tax laws on his personal property.