When I retired after 40 years, the last 30 with the same employer of which 26 had been in a very senior post, my valedictory letter was addressed to a different person, told me in short terms that my resignation (due to ill health) had been received and reminded me to return any equipment that didn't belong to me. It wasn't even signed.
I couldn't but imagine that someone was glad to see the back of one who asked the awkward questions and, perhaps, had seen it all before.
B@stards.