InmateAid sends letters daily, you get notification in your member account the moment they are mailed. The only way you will truly know is if they respond back or call you on the telephone and acknowledge the receipt of your letter. Give it a try, our members love the convenience of the service and for the inmates - there's nothing better than hearing your name at mail call.
https://www.inmateaid.com/ask-the-inmate/how-do-i-know-if-the-inmate-read-the-letter-i-sent.amp#answer
Accepted Answer Date Created: January 28,2013