In modern American practice the state-operated court system for transferring wealth on death, called probate, is being displaced. The wealth-transfer process has been increasingly privatized, conducted now mostly in the back offices of financial institutions rather than in the probate courts. Referred to as the “nonprobate revolution,” this paradigm shift has profound implications for how inheritance disputes are litigated today. Case in point: the increased “federalization” of inheritance litigation. So when can you litigate your…