This wasn't ending therapy, but switching T's. I'd been seeing ex-T for 6 years and just felt stuck, particularly on a big issue for me (transference for ex-marriage counselor--it's complicated!) I made an appointment with a different T, thinking maybe I'd just see him for a month or two for consultation on that issue, then go back to ex-T. I'd I told her at the end of our last session together of my plans. I said if I ended up deciding to stay with him, I'd come back for some termination sessions with her. Well, I ended up staying with him and never went back for termination sessions. I realized I'd be doing that for her, not for me. (I did email her to let her know.)

My T has said that, in his experience, true "termination sessions" are the exception, not the rule. He said it's much more likely that, at the end of a seemingly normal session, a client will just say to him, "OK, so this was my last session." Or they might cancel a session then not return. He said he finds benefit in at least having, say, a 15-minute conversation about termination (rather than an abrupt announcement at the end), but doesn't think traditional termination sessions are absolutely necessary.

Also, welcome to PC! looks like this was your first post.