Guaranty Trust Co. v. York

York (plaintiff) sued Guaranty Trust Co. (defendant) in federal court on diversity grounds for breach of trust, with New York law supplying the substantive rules; Guaranty argued the suit was time-barred under the state statute of limitations, but York contended that because the suit was framed in equity, the federal court wasn't bound by that state deadline. The court of appeals agreed with York and allowed the suit to proceed, and the Supreme Court granted certiorari.