overnight an envelope

overnight an envelope refers to the process of sending an envelope via an expedited overnight shipping service. USPS offers Priority Mail Express for overnight delivery, which guarantees next-day delivery for documents or letters sent within the U.S. Other carriers, like FedEx and UPS, also offer similar overnight services for envelopes. Overnight shipping is ideal for urgent documents or packages that need to arrive quickly, and it typically comes with tracking and delivery guarantees. While the cost may be higher than standard shipping, overnight services provide a reliable solution for time-sensitive shipments.