On April 4th, U.S. International Trade Court Judge Richard Eaton ordered the government to start refund procedures for certain customs duties that were ruled unconstitutional by the Supreme Court. This order primarily applies to customs duties where the final amounts have not yet been officially confirmed. Interestingly, most importers' customs payments are likely still in the pre-transfer phase to the Treasury Department, suggesting that the refunds could be substantial, especially given the context of the Trump administration's appeal against these changes.

Judge Eaton's ruling commands the customs and border protection agency to recalculate the customs duties collected during importation procedures, excluding those related to specific unconstitutional tariffs under the International Emergency Economic Powers Act (IEEPA). The so-called 'liquidation' process, which finalizes the duty amounts, has been directed to exclude previous unconstitutional tariffs unless they are legally affirmed by the courts. However, there are concerns regarding the finality of these refunds due to existing legal precedents, which indicate that refunds for duties now classified as illegal might not always be granted.

The court's decision originated from a refund lawsuit filed by a filter manufacturing company based in Nashville, Tennessee. Judge Eaton clarified that he would oversee all cases related to refunds concerning IEEPA tariffs, and emphasized that all importers have the right to benefit from the Supreme Court's ruling. Furthermore, Judge Eaton has instructed the government to present a plan to implement refunds for all relevant importers, including those who did not initiate lawsuits, thereby structuring the entire refund process framework wisely a significant precedent in U.S. customs law.