does shein use usps for shipping many of its orders, especially for U.S.-based customers. While Shein partners with multiple couriers to handle its global deliveries, USPS is often used for the final leg of shipping within the U.S. Shein’s international shipping process includes using couriers like DHL, FedEx, or UPS to deliver packages to the U.S., and USPS handles the last-mile delivery, providing tracking updates and delivery confirmation.