Can you sent documents overnight to a PO Box?

Yes, you can send documents overnight to a PO Box, provided you use a courier service that delivers to PO Boxes, such as the United States Postal Service (USPS) for Priority Mail Express. However, many private courier services, like UPS or FedEx, typically do not deliver to PO Boxes and require a physical street address. It's important to verify the specific requirements of the courier service you choose to ensure successful delivery.