One method of wording for wedding RSVP cards is to write: "The favor of a reply is requested by [date]" with the guest's name underneath and acceptance and declination blanks to check, says About.com. Another approach is to write "will ____ attend," and invitees write "not" if they cannot go.
More informal ways to word RSVPs are to write: "We are excited to celebrate with you. Please respond by [date]," with the guest's name and check mark spaces for an acceptance and declination below, according to About.com. "We have reserved two seats in your honor" is another way to begin RSVP wording.
Wording can be as informal as to use the word "posse," with a space left blank for a guest to fill in the number of people that person is bringing, says About.com. In fact, any wording for a wedding RSVP card should have a blank line for the number of guests unless the invitation specifically states the number allowed. Also, to avoid too many people showing up, an RSVP card could say “___ of ___ guest(s) will attend.” Cards can also have separate attendance count lines for the wedding and the reception, especially if a lot of children are involved. A pre-addressed, stamped envelope should always be included.