Putting aside the very rude "dude", it is not a matter of how RSUs work or do not work, more simply they never talk about RSUs because they do not give RSUs. As

Putting aside the very rude "dude", it is not a matter of how RSUs work or do not work, more simply they never talk about RSUs because they do not give RSUs. As I said, you never got an offer or you did not pay any attention. It is fine either way, of course. No need for any letter.