Costco sued for seeking refunds on tariffs customers paid

Costco faces a class-action lawsuit for demanding customers refund tariffs the company already passed on to them—a sharp turn from typical retail pass-through. The suit alleges Costco requires tariff reimbursements even after customers paid higher prices, creating a double hit that no other major retailer on this list, including the runner-up, has attempted. About 30% of affected shoppers reported being asked for additional payments, according to the complaint. This practice, if proven, could set a costly precedent for consumer protection law.