I had an exit interview, as did my colleague and we delivered them in person to our Regional MD with pleasure.
I burnt a lot of bridges, I would never go back there again, and I will never be in a situation where I will need any of them. I am 100% sure of that.
Writing a letter of resignation
once worked in an agency where the only decent humanity shown was a very high-end smoked salmon at Christmas. My resignation letter was taken straight from Douglas Adams. 'So long and thanks fo all the fish.'