So our rsvp deadline is sept 1st and our venue wants our final head count by sept 4th. What is the best way of getting peoples rsvp's back? Do I give a heads up now that it needs to be sent by Sat or do i wait til sat & start calling/texting ppl? A friend of mine said when they called for rsvp's a lot of ppl just said yes and then didnt show up. does that happen often?