overnight envelope

overnight envelope refers to a service that allows for the delivery of a document or small package overnight, typically through carriers like USPS, FedEx, or UPS. Overnight envelope services are designed to ensure that important or time-sensitive documents reach their destination by the next business day. USPS offers Priority Mail Express for overnight delivery, while FedEx and UPS offer similar services for faster shipping. This service is ideal for legal documents, contracts, or urgent correspondence that must be delivered quickly.