Written by attorneys · grounded in primary & secondary sources — see below
The portion of each state's law that resolves disputes with significant contacts to more than one jurisdiction by determining the effect given to foreign law and judgments. It identifies which local law governs the rights and liabilities of the parties when events or parties cross state or national lines.
Sources & Authorities
How it applies
Common Examples
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Diversity Suit Applies State Choice Rules
Preston Pratt, a New York resident, sues a Delaware corporation in federal court in New York over a contract formed in Pennsylvania. The federal judge must follow New York's choice-of-law rules to decide whether New York or Pennsylvania substantive law governs the claim.
Federal Court Follows Forum Conflict Rules
Patricia Patel, domiciled in Ohio, brings a diversity action in a federal district court in Ohio arising from an accident in Indiana. The court applies Ohio's conflict-of-laws rules rather than any independent federal rule to select the governing substantive law.
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Peak Performance, a Florida company, and a German buyer include a London forum-selection clause in their contract. The court upholds the clause and applies English law to the dispute even though performance occurred partly in the United States.
The Bremen v. Zapata Off-Shore Co.407 U.S. 1 (1972)
Multiple State Contacts Trigger Choice Analysis
Paul Peterson, insured by Patriot Insurance, dies in Minnesota after an accident in Wisconsin. His widow sues in Minnesota federal court. The court weighs contacts with both states under Minnesota choice-of-law principles to decide which state's law measures damages.
Allstate Insurance Co. v. Hague449 U.S. 302, 308 n.11, 101 S.Ct. 633, 638 n.11, 66 L.Ed.2d 521 (1981)
Product Defect Claim Spans Jurisdictions
Progressive Healthcare purchases equipment from Paragon Construction that fails in Texas after manufacture in New Jersey. The buyer sues in Texas state court. The court applies Texas choice-of-law rules to determine whether New Jersey or Texas law governs the warranty and tort claims.
East River Steamship Corp. v. Transamerica Delaval, Inc.476 U.S. 858, 106 S.Ct. 2295, 90 L.Ed.2d 865 (1986)
Long-Arm Jurisdiction and Choice of Law
Parker Phillips, a Michigan franchisee, sues Burger King in Florida federal court over a contract dispute. The court first confirms personal jurisdiction under Florida long-arm rules, then uses Florida choice-of-law rules to select the substantive law that governs the franchise agreement.
Burger King Corp. v. Rudzewicz471 U.S. 462, 474 (1985)
Common questions
Frequently Asked
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How does private international law differ from public international law?+
Private international law addresses choice-of-law and jurisdictional questions in disputes between private parties that cross borders. Public international law governs relations between sovereign states themselves.
What subjects does private international law cover?+
It covers judicial jurisdiction, recognition of foreign judgments, and choice-of-law rules that select which state's or country's substantive law applies to a dispute with multistate contacts.
Must a federal court sitting in diversity follow state choice-of-law rules?+
Yes. Under Klaxon, a federal court applies the conflict-of-laws rules of the state in which it sits because those rules are treated as substantive for Erie purposes.
Does private international law include constitutional limits on state choice-of-law decisions?+
Yes. The Due Process and Full Faith and Credit Clauses impose outer boundaries on a state's power to apply its own law or to refuse recognition of sister-state judgments.
433 U.S. 186 (1977)Conflict of Laws
…is a customary elliptical way of referring to jurisdiction over the interests of persons in a thing." Restatement (Second) of Conflict of Laws § 56, Introductory Note (1971) (hereafter Restatement). This recognition leads to the conclusion that in order to justify an exercise of jurisdiction in rem , the basis for jurisdiction…