Georgia law has been changed to allow the setting aside of a previous determination of paternity, and the support award that went with that Order.

If new genetic evidence is available showing that a previous legal determination of paternity is incorrect, a motion may be filed to set aside the previous Order and award of child support. This action can also relieve the party from past due payments. The motion must be filed within 90 days of the genetic test showing that there is a 0 percent probability that the person ordered to pay support is the biological father of the child. There are numerous exceptions to this new provision and the statute should be consulted to determine if there is a valid case to set aside. O.C.G.A.§ 19-7-54 (effective May 9, 2002)

SOURCE: DivorceNet