<p>You are completely in your rights to ask him to sign a FERPA waiver. You are also completely in your rights to insist on knowing whether he is speaking to the ex-girlfriend, and what his grades are to continue providing financial support. However, you do not have the right to install a keylogger on the computer which he uses on the campus network. The very idea is counterproductive anyway. As soon as he knows you don’t trust him, he will only use that computer to school work, and will use campus computers to communicate with friends. </p>
<p>Since he’s completed at least his first year of college, I’m going to assume he’s legally an adult. Talking to his professors will only make you look like an extreme helicopter parent. Ask him about his grades, and tell him you won’t provide money without them. If you don’t trust what he’s telling you, ask him to log onto his student account and show you. Either he’ll show you, or he won’t, and you can proceed from there. If he gets really angry with your lack of trust, maybe he’ll find a way to produce a website with grades that looks like the real thing, and really submarine you! Of course, if he does that, maybe his grades don’t matter so much, because he has the talent to do so.</p>