Extraterritoriality refers to the application of a nation’s law to persons, conduct, or property outside its own territory. Customary international law allows nations to regulate extraterritorially on a number of different bases, including effects, nationality, and universal jurisdiction. Nations generally limit the extraterritorial application of their laws to a greater extent than customary international law requires. For example, the United States applies a presumption against extraterritoriality to federal law and sometimes imposes additional limitations as a matter of prescriptive comity. Some U.S. states have their own presumptions against extraterritoriality, which may differ from the federal presumption.
A Primer on Extraterritoriality
[Updated September 1, 2025] Extraterritoriality refers to the application of a state’s law beyond the state’s borders. Although the word “extraterritorial” often has negative connotations, international law permits a great deal of extraterritorial regulation. In a world where trade, information, crime, and lots of other things regularly cross borders, states often have an interest in…
Continue ReadingNew Paper on Extraterritorial Application of the Wire Fraud Statute
I have written before about a circuit split over when the federal wire fraud statute applies extraterritorially. The lower federal courts disagree about how much use of U.S. wires is required to make an application of the statute “domestic.” The Second Circuit has held that use of U.S. wires must be a “core component” of…
Continue ReadingTrademark Infringement and Exports after Abitron
Two years ago, in Abitron Austria GmbH v. Hetronic International, Inc. (2023), the Supreme Court applied the presumption against extraterritoriality to the federal trademark statute (the Lanham Act), holding that the Act applies only to domestic conduct. Abitron involved imports. Products bearing an infringing trademark were made abroad, some of which were sold, directly or…
Continue ReadingA Win for Helms-Burton Plaintiffs, But Potential Loss for US Companies
On July 30, 2025, the U.S. Court of Appeals for the Eleventh Circuit vacated a district court’s decision dismissing José Ramón López Regueiro’s case against American Airlines and LATAM Airlines under Title III of the Helms-Burton Act. The court of appeals remanded, holding that the district court’s interpretation of the citizenship prerequisites in Helm-Burton conflicted…
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