I've never had to fill out any forms or sign anything with a T. The first time I saw my current T, it was in his capacity as a pdoc, and he wrote down my personal ID number, address, and phone number at the first appointment. That's the only information he regally requires, in order to get paid. I saw him a couple of times for pdoc appointments, before I asked if I could come for psychotheraphy, so my first therapy appointment was perhaps a bit different; in any case, T took my history rather gradually over several sessions, and never asked "Why do you want therapy" or "Why should I take you on as a patient" or "What do you want to change" - those things would have been impossible to answer!