Foreign Sovereign Immunity

Customary international law provides immunity to states from the jurisdiction of foreign national courts. The immunity extends to state agencies and to state-owned property, protecting them from adjudicatory jurisdiction and from enforcement measures. Foreign sovereign immunity has important exceptions, including for waiver, for some conduct or property related to commercial activity, and for some torts committed on the territory of the forum state. In the United States, all aspects of foreign sovereign immunity for cases in state or federal court are governed by a federal statute, the Foreign Sovereign Immunities Act.

A Primer on Foreign Sovereign Immunity

The immunity of states from the jurisdiction of foreign domestic courts is a long-standing and mostly uncontroversial principle of customary international law. The International Court of Justice has described foreign sovereign immunity as a procedural doctrine of international law, one that “derives from the principle of sovereign equality of the States.” As a practical matter,…

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Second Circuit Hears Halkbank Oral Argument

On February 28, 2024, the Second Circuit heard oral argument in United States v. Turkiye Halk Bankasi A.S. From the judges’ questions—which admittedly came almost exclusively from Judge Bianco—the panel seems likely to hold that Halkbank, a Turkish state-owned bank, is not immune under federal common law from criminal prosecution for violating U.S. sanctions on Iran. That…

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Choice of Law in the American Courts in 2023

The thirty-seventh annual survey on choice of law in the American courts is now available on SSRN. The survey covers significant cases decided in 2023 on choice of law, party autonomy, extraterritoriality, international human rights, foreign sovereign immunity, adjudicative jurisdiction, and the recognition and enforcement of foreign judgments. So, on this leap day, we thought…

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What Does Customary International Law Say About Halkbank’s Immunity?

Tomorrow, the Second Circuit will hear argument in United States v. Turkiye Halk Bankasi A.S. to consider whether Halkbank, a Turkish state-owned bank (but not its central bank), is immune from criminal prosecution for violating U.S. sanctions on Iran. Halkbank claimed immunity under both the Foreign Sovereign Immunities Act (FSIA) and federal common law. The U.S….

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