perfect! wedding rsvp (reply card) wording -- love this part: "•Some guests will assume that their guests/dates/friends are of course invited, regardless of to whom you address the card. You can avoid these assumptions by writing “___ of ___ guest(s) will attend”, and then pre-filling in the second blank with the number of people that you are inviting. Some may find this slightly distasteful, but it certainly does get the point across!"
You may have guests who will neglect to write in their names, or who write illegibly. Solve this problem by numbering your guest list, then inconspicuously writing the corresponding number on the back of each response card.