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On February 2, 2021, the Eleventh Circuit joined the Second, Sixth, Seventh, Eighth, and Ninth Circuits in holding that Rule 23 does not require proof of an administratively feasible method to identify absent class members. In so doing, the court rejected the heightened standard for ascertainability recognized by the First, Third, and Fourth Circuits. Nevertheless, the Eleventh Circuit reiterated that ascertainability—which asks whether a class is adequately defined—remains an implicit requirement of Rule 23. Moreover, while the administrative feasibility of determining class membership will rarely defeat class certification standing alone, it remains a factor for courts to consider when assessing the manageability of a class under Rule 23(b)(3)’s predominance requirement.