Opinion · Supreme Court of the United States

Erie Railroad v. Tompkins

58 S. Ct. 817

Type
Opinion
Court
Supreme Court of the United States
Jurisdiction
Federal
Date
1938-04-25
Topic
general

holding that in a diversity action, a federal court must apply the law of the forum state | holding that, under the Constitution, federal courts must apply state law — including state common law — in diversity eases | holding that substantive law of the state must be applied, except in cases governed by the Federal Constitution or by Acts of Congress | holding that a federal court sitting in diversity is bound to follow the law of the forum state | holding that when a federal court sitting in diversity enforces state substantive law but federal procedural law | holding that a district court sitting in diversity must apply the law of the state in which it sits to the facts of the case | holding that federal courts presiding over causes of action created by state law should apply state substantive law but federal procedural law | holding that federal courts sitting in diversity are to apply state substantive law but federal procedural law | holding that a federal court sitting in diversity applies the law of the forum state | holding that federal district courts sitting in diversity jurisdiction should apply state law to substantive issues, and federal law to procedural issues | holding that in federal courts, except in matters governed by the Federal Constitution or by acts of Congress, substantive law to be applied is law of the state | holding that federal court sitting in diversity must apply substantive law of state in which it sits | concluding that Illinois's UTSA preempts claims "that are essentially claims of trade secret misappropriation, even when the alleged 'trade secret' does not fall within the Act's definition" | holding that in diversity cases brought under state law, a federal court must apply the substantive law of the forum state’s highest court | holding that a federal court sitting in diversity is bound to follow the law of the forum state | holding that federal courts sitting in diversity must apply state substantive law, and federal procedural law | holding that federal courts presiding over causes of action created by state law should apply state substantive law but federal procedural law | holding that a federal court sitting in diversity is bound to follow the law of the forum state | holding that state law governs substantive issues and federal law governs procedural issues | holding that a federal court sitting in diversity jurisdiction applies the substantive law of the forum state | holding that federal courts must apply federal procedural rules and state substantive law when adjudicating state law claims | holding that a federal court sitting in diversity jurisdiction applies the substantive law of the forum state | holding that when cases come before federal courts through diversity jurisdiction, federal courts apply the substantive law of the state where they sit | holding that federal courts sitting in diversity should apply the substantive law of the forum state | holding that federal courts apply state substantive law and federal procedural law in a diversity case | holding that courts apply the procedural law of the forum and the substantive law of the jurisdiction originating the claim | holding that a federal court sitting in diversity jurisdiction applies the substantive law of the forum state | holding that federal courts were not at liberty to exercise independent judgment on substantive state tort law | holding that federal courts sitting in diversity jurisdiction apply federal procedural 26 law and state substantive law | holding that a federal court sitting in diversity jurisdiction applies the substantive law of the forum state | holding that there is no “federal 17 general common law” for state causes of action | holding that federal courts sitting in diversity apply state substantive law and federal procedural law | holding that a federal court sitting in diversity jurisdiction applies the substantive law of the forum state | concluding that a plaintiffs “claims for breach of fidu

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