what post office does shein use for shipping depends on the delivery destination and the carrier’s logistics options. Shein generally partners with a variety of carriers, including USPS, UPS, and DHL, to handle deliveries depending on the region and the shipping service selected. In the US, USPS often handles the final delivery for Shein’s international orders once they enter the country, while other couriers may be involved for earlier stages of the journey. Shein provides tracking information for customers so they can track their orders via the assigned carrier.