US Customs and Border Protection is facing pressure to refund approximately $166 billion in tariffs invalidated by the Supreme Court, with the agency seeking a 45-day delay to deploy an automated system for processing these large-scale repayments.Meanwhile, a Costco member has sued the company, alleging it would be unjustly enriched if it retains both tariff refunds from the government and the higher prices previously charged to consumers for affected goods.These developments underscore a growing trend of importers seeking tariff reimbursements and customers demanding direct restitution for alleged overcharges, complicating the administration of trade policies.