So this may seem really weird, mean or just plain unheard of butttttttttttt here it goes....We have mailed out the RSVPs with return postage stamps so there really isn’t any excuse for people not to return them with accept or decline. We also have a website that you may use to RSVP. We are thinking of giving about a week past snail mail to receive the RSVPs which I think is fair. We are considering creating a thank you for considering attending our wedding card to send to those who did not RSVP by the date. Saying something like our RSVP date has passed and we appreciate you considering attending our special day however the guest list has been finalized but we do hope you can join us at our one year anniversary celebration.......feedback or ideas on how to let people know they didn’t respond please don’t come