Oh the RSVP drama llama — I don't have a cure-all, BUT I do have a cute, playful, non-aggressive way to get some those errant RSVPs from your professional procrastinator guests!
Just customize your reminder letter, email it to your guests who haven't responded yet, and include the link where they can RSVP. If you aren't online RSVPing, then edit to include your RSVP address, and remind them the deadline is coming up. I'd do this when it's a week or two before the date, that way if they STILL aren't responding, then you can say you've already warned them and can get a little more aggressive if need be.
If you want to use this exact sign template, click on the photo below and save it in the full size.
I printed these on cardstock — I would not use regular paper. In fact I'd love to "do this right" with a wooden sheet all artsy and cute. If you think you might have a few procrastinators, you might want to use these signs for a couple shots during the engagement shoot.
Or, if you like the template, but would want to change the wording or font, you can download the Word doc here and get to reminding!