Ask a simple question.
I just spent thirty five minutes talking to a fellow inmate who stopped by to ask me a simple question: "Can you print information off a CD ROM for a computer?"
Instead of giving him the short answer, I said yes and no, and I asked him for the specifics.
He shows me one of those newspapers that "challenge the Establishment", and an ad which stated that the laws which govern the incarceration of federal prisoners were never voted into law. Supposedly Congress was not in session at the time!
Well, send them a $100 postal money order, and they will send you a CD.
I told him the warning signs to me were a statement that said "hard copies of cases were available on a case by case basis", and also the request for a postal money order, no checks or charge cards which would give you the possibility to fight the purchase of the CD later.