You can drop off prepaid USPS packages at any USPS location, including post offices, collection boxes, and USPS blue mailboxes. You can also schedule a free package pickup from your home or office by visiting the USPS website or calling 1-800-ASK-USPS. 1. Where can I drop off prepaid USPS packages?Answer: You can drop off prepaid… Continue reading where can i drop off prepaid usps packages?