Has anyone had their new t talk to their old t?

Did it help? How?

New T talked to ex-T. It didn't help much. She learned like 4 or 5 things about me. The only one I remember is that I shouldn't journal because I obsess over my thoughts and feelings. T has learned about me simply through spending time with me, and we both prefer it that way.

I didn't allow it.

The first time I did this it wasn't helpful at all. Both T's had vastly different perspectives and approaches. My "incoming" T though x T had mishandled me in many ways.

When I had my 2 T's talk a few years ago when I started CBT, it went a little bit better. It was like letting CBT T know about past trauma without having to say it all all over again.

I have done it. I sign consent for my doctors to talk to each other when I feel comfortable.
It has been helpful when I started with a new T so she knew some backstory and I didn't have to start back at the why are you here, this is what therapy is discussion. If there is something you do not feel comfortable talking about or it is best to handle something a certain way, they can clue them in on that. For example, if there was prior abuse that you were not comfortable discussing, old T could just let T know that and make suggestions for how to best support you.
In my experience when I went from old T to new T she gave her some basic info regarding why I was there, how long, diagnoses, treatment and such. Then more information on what had been happening recently (like what the pressing issue was).
I used to be very wary and controlling but have realized that allowing for communication can (in the right circumstances) make things much easier. New T gets unbiased info, not clouded by emotions and I have to say less to new T (its hard for me to speak to new T's/people).
This was kinda long but I will end with this: Therapists are professionals. Most are able to be honest and frank with each other without fear of the reaction. They aren't invested to the level that we are.

I don't let the two I see now talk. The old one I saw is retired, moved out of state and is possibly dead by now.

I have authorized 1 and 2 to talk to each other. They have at least once. However, No. 2 seems to feel it would be useful if I told her everything I've told No. 1 myself...a point of view that I see the merit of intellectually but not so much emotionally.

I did when I had to make the switch from a public program to a private one. My old T had a part time private practice with my new T and so I agreed they could talk. I honestly never had any idea of how it went or what they even talked about- it had never come up afterwards, but it made me feel like the new one would get some more understanding about me. Probably helped that I didn't leave the old one on bad terms, it was sort of a forced move due to the program I was in.

It would make me way too paranoid.

I'm ok with T talking to pdoc though.

Yes. Both in terms of changing ts and in having more than one counsellor. My T, MH nurse and psychologist have spoken to each other and have open permission from me to speak as little or as often as they choose. I don't have any concerns around it. I respect each of them and trust their professionalism and ethics.