overnight deliver is a shipping service that guarantees the delivery of packages or documents by the next business day. This expedited delivery option is commonly used by businesses and individuals who need to send items urgently. Major carriers like FedEx, UPS, and USPS offer overnight delivery services, which may vary in cost depending on the size and weight of the package, as well as the delivery destination. For example, USPS offers Priority Mail Express, which provides overnight delivery to most U.S. addresses, including PO Boxes. UPS and FedEx also have similar services, with FedEx First Overnight being one of their most expedited options. Overnight delivery is particularly popular for time-sensitive shipments such as legal documents, medical supplies, and high-value items. Although it’s generally more expensive than regular shipping, it provides peace of mind by ensuring quick and secure delivery. It’s important for customers to compare rates across different carriers and understand the specific terms of each service to select the most suitable option for their needs.