overnight delivery usps

overnight delivery usps is a premium shipping option known as USPS Priority Mail Express, offering next-day delivery to most U.S. addresses, including P.O. boxes. This service is ideal for urgent shipments such as legal documents, perishable goods, or time-sensitive packages. USPS guarantees overnight delivery by 6 PM the next day, with tracking and insurance included. Customers can drop off packages late in the day at selected post office locations or schedule a pickup. Understanding how overnight delivery USPS works helps businesses meet tight deadlines and maintain customer satisfaction. It’s one of the fastest and most reliable services offered by the United States Postal Service.