What is the name of your state (only U.S. law)? Ohio

This isn't about me so I don't know what the actual rules are, but I looked up in the basics of probation for some Ohio counties. I read that if you are on probation that you are not allowed contact with felons? Is that for every case? Is that one of those general rules? If so, how do you contact the probation department to tell them about someone violating their probation?