Once I was signing a book for a guy who I was friendly with, see all the time, and should have known the name of (but didn’t). He asked me to personalize it to him, so I pulled the “ah, remind me how to spell your name again?” trick [to get away with not knowing it]. but then he said “My name is Bill” Then he spelled it for me hahahaha. I’ll never forget him or his name again, but it’s too late