I wouldn't be surprised if they forgot. People are so concerned about their own asses they forget about some pretty major details imo. When I gave my two weeks in an email, my manager tried to eek out an extra week from me by delaying telling my team. He told me not to tell anyone and then made an announcement the Friday after the Monday I told him. So to my team it looked like I put in 1 weeks notice. then tried to convince me I had to stay another week. He was a manipulative bastard but only concerned about his own ass and didnt give a shit. I gave a serious medical reason for leaving, too, but clearly he didnt give a shit about my mental or physical state whatsoever.