Over my 20 year career in the Army I had several occasions to write Memorandum For Record (MFR) about actions, situations, or conversations. It is the classic CYA move. I filed the original, sent copies each to the individual involved, my boss (or his boss, if it was about him), and his or her boss. It was my way of saying "I won't stand idly by while X occurs".
I didn't give them to a "friend".