overnight mailing usps

overnight mailing usps refers to the service offered by the United States Postal Service (USPS) that allows customers to send packages and documents for overnight delivery. The USPS service that provides this feature is called Priority Mail Express, which guarantees delivery by the next day in most cases, including on weekends and holidays. It includes tracking, insurance, and delivery confirmation. USPS also offers various shipping options for faster delivery, including the Priority Mail service, but Priority Mail Express is specifically designed for overnight shipping.