You can use the [Send a Letter](https://www.inmateaid.com/letters) Service through InmateAID. We will make 100% certain that the letter will get to your inmate.
https://www.inmateaid.com/ask-the-inmate/when-writing-to-apollo-nida-how-should-i-address-the-envelope-cause-i-tried-writing#answer
Accepted Answer Date Created: February 22,2016