S.D. Codified Laws § 54-9-13.2
In addition to those otherwise provided in this chapter, the court may authorize an assignee to bring an action, which he is hereby empowered to maintain, against any person, who with reasonable cause to believe the assignor was insolvent as defined in § 54-8A-2, has within four months of the assignment received a voluntary transfer from the assignor of money or property for or on account of an antecedent debt, the effect of which transfer is to enable the creditor to obtain a greater percentage of his debt than some other creditor of the same class, and the assignee may recover the property so transferred or its value. For the purpose of this section a transfer shall be deemed to have been made when it is so far perfected that no creditor having a judgment on a simple contract without special priority (whether or not such a creditor exists) could have obtained an interest superior to that of the transferee therein. A transfer not so perfected prior to the assignment shall be deemed to have been made immediately before the assignment.
SDCL 54-9-13.2