Costco has sued the U.S. government to ensure it will receive refunds if the Supreme Court rejects President Donald Trump’s bid for sweeping

authority to impose tariffs.

In a complaint filed on Friday in the U.S. Court of International Trade in Manhattan, Costco said Trump’s use of the International Emergency Economic Powers Act to impose tariffs left it uncertain whether businesses can recoup sums they should not have paid.

The nation’s largest warehouse club operator said U.S. Customs and Border Protection denied its request for more time to make final calculations of tariffs owed, threatening its right to complete refunds even if the Supreme Court rules against Trump.

Customs and Border Protection had no immediate comment. Costco did not immediately respond to a request for commen

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