I agree with Solepa - I think your T keeps the letters/email with her session notes about you, which she needs to be able to do her job (to refer back to to see your progress, for instance).

I have brought in things in writing a few times. T has usually asked me whether I want it back or if I want him to keep it. Last time I brought something in I think I stuffed the letter back into my bag after I'd read it to him. I actually feel a little hurt that he doesn't really think it's important enough to save. It's not as if his memory is that great, anyway. I have also sent him letters, a couple of times last summer while he was on holiday (I sent them to his office, of course.) He has brought them up a couple of times since so I get the feeling that he's gone back to read them again.

So there are different ways of looking at everything. But I can understand the slight paranoia about having your writing saved somewhere where you can't control what happens to it.

I'll be bringing in a letter for T tomorrow. I wonder if he's going to want to hold on to it or not...