I refer to people by their first names. My therapist usually will demand a first name if I'm describing some event or interaction, not because he wants enough info to report people but because he believes that details are important when recounting an event or experience and names are one of those details. He's never asked for last names, and I've never mentioned any.

He never asked me to fill out any paperwork. He never even knew my address so he couldn't even have called the cops on me if I threatened suicide (which I never did and wouldn't have done). I think the population he works with makes that sort of thing unnecessary.

I've never told him anything that would be subject to mandatory reporting. Even if I did, he wouldn't have been able to report anyone since I wouldn't have given him any information beyond a first name.

I would be really annoyed if my therapist threatened to report someone I didn't want to report myself. I don't know what I would have done had that happened. Luckily, it never has.