how to send a letter overnight

how to send a letter overnight refers to the process of mailing a letter with expedited shipping, ensuring it reaches the recipient the next day. The fastest service for sending a letter overnight is USPS Priority Mail Express, which guarantees next-day delivery to most locations, including on holidays and weekends. Alternatively, services like FedEx Express and UPS Next Day Air offer overnight shipping options as well. When sending a letter overnight, it’s important to properly address the letter and choose the appropriate shipping service to meet the required delivery timeline.