Federal Rule of Civil Procedure 23(f) gives federal courts of appeals authority to permit interlocutory appeals from orders granting or denying motions to certify a class. The rule leaves it murky, however, whether an order partially decertifying a class is appealable under Rule 23(f). In a brief opinion by Judge Posner, the Seventh Circuit has now held that it is.

In Matz v. Household International Tax Reduction Investment Plan (pdf), the court ruled that “an order materially altering a previous order granting or denying class certification is within the scope of Rule 23(f) even if it doesn’t alter the…
Continue Reading Seventh Circuit: Order Partially Decertifying a Class Is Appealable Under Federal Rule of Civil Procedure 23(f)