The term 'USED FEDEX' refers to the use of the FedEx shipping service. The crossword solutions for this term are 'SENT' (4 letters) and 'SHIPPED' (7 letters). This indicates that the sender used FedEx to send or ship a package. FedEx is an American multinational delivery services company based in Memphis, Tennessee. It is known for its overnight shipping services and is one of the largest companies of its kind in the world.