On November 28, 2025, Costco filed a lawsuit against the United States seeking refunds for tariffs imposed under the International Emergency Economic Powers Act (IEEPA). Several federal courts—including the Court of International Trade (CIT), the District Court for the District of Columbia (D.D.C.), and the United States Court of Appeals for the Federal Circuit (Federal Circuit) —have already ruled the IEEPA tariffs unlawful. The Supreme Court, now reviewing the issue in the consolidated V.O.S. Selections case, heard arguments in November and is expected to issue its decision in the coming months.Continue Reading Unlocking Duty Refunds: How Korean Multinationals Can Benefit from Costco’s International Emergency Economic Powers Act (IEEPA) Challenge


