My FI has a friend from his old job who's already told him that she won't be attending the wedding (she actually told him this before we set a date, so, of course, nothing like STDs or invites had gone out yet).
Is it rude not to send her a STD/invitation when the time comes? She would have been invited had she not already made it clear that she's not coming, but we also never told her that she was going to be invited -- she simply took it upon herself to tell my FI that she wasn't going to attend.
(Just to clarify before anyone asks, her reasoning was being awkward in social situations etc.)