My Fiancé and I have invited 250 people to our wedding (100 more then we originally thought) We have several single friends who we addressed the invitation to individually and did not include a plus one in the invite, now several have RSVP'd back with a plus on for their count. Any advice on how to tell someone they cannot invite a plus one? I wish I could afford to let everyone bring a plus one but it has always been my understanding when you get a formal invite and it is addresses solely to you that if you want to bring someone additional you should ask?