I know formally when sending out wedding invites and you are extending a plus one you are supposed to address the envelope to Ms. Jane Doe and Guest. Would it really be that big of a deal if I did not do that? Our RSVP cards have a place where I specify how many seats are reserved. So it it fairly clear how many people are invited. For example the envelope would say Ms. Jane Doe, and the RSVP card says "we have reserved 2 seats in your honor". Is that okay? Or will people be confused?