us mail overnight letter

us mail overnight letter services are provided by USPS through Priority Mail Express. This option guarantees next-day delivery to most U.S. addresses, including P.O. boxes, with tracking and insurance included. Overnight letters are ideal for time-sensitive legal documents or important communications. The cost typically starts around $28 but may vary based on destination and weight. Businesses using this service can schedule pickups and track delivery status online through the USPS website.