The Barton doctrine, which has been imposed in “an unbroken line of cases … as a matter of federal common law,” In re Linton, 136 F.3d 544, 545 (7th Cir. 1998) (Posner, J.), requires that plaintiffs “obtain authorization from the bankruptcy court before initiating an action in another forum against certain officers appointed by the bankruptcy court for actions the officers have taken in their official capacities.” In re Yellowstone Mountain Club, LLC, No. 14-35363, ___ F.3d ___, 2016 WL 6936595, at *2 (9th Cir. Nov.

Cases decided recently in Florida and Illinois call into question one legal rule that some might have thought well-settled: a first-perfected security interest in collateral beats a later-perfected lien creditor's interest in that same collateral. Seems simple enough. Except this rule might not be followed in every State.