To ensure delivery, it is best to contact the correctional facility to which you will be shipping to inquire about any specific rules they have regarding what can and cannot be accepted, such as subject matter, book format, and what courier services they do and do not accept.
Inmate numbers can be included in the Last Name field. You can also enter the recipient's inmate number, enter it in the "Apt, Suite, etc." field in the shipping address.
Most correctional facilities will accept only USPS parcels. If your order must be shipped by USPS, you need to check the box at the bottom that states: "Address can't be serviced by UPS". Select this box while adding the Correctional Facility as a shipping address during the Checkout process.
From a BN.com Account Address Book
From the Checkout as Guest Shipping Address Field