On this blog, we have previously written about the growing split among the federal circuits concerning courts’ approaches to ascertainability. The Third Circuit, in a string of cases within the last five years, adopted a test requiring that class members must be identifiable without extensive and individualized fact-finding or “mini-trials,” and a plaintiff must present evidentiary support to demonstrate that a model it proposes to satisfy Rule 23’s requirements will be effective. The Eleventh Circuit in Karhu v. Vital Pharmaceutical, Inc. similarly found that a plaintiff must establish an administratively feasible method by which class members can be identified.
In Mullins v. Direct Digital, LLC, the Seventh Circuit rejected the Third Circuit’s approach, finding that the Third Circuit’s test was a “heightened” requirement above and beyond Rule 23’s requirements. The Seventh Circuit adopted a more lenient approach and looks only at whether a class can be ascertained by objective criteria, not whether there’s an administratively feasible way to identify