Oh wow, I am an idiot! It was just brought to my attention that the first set of invites we sent out (for out of town guests) had our return address label in the wrong spot for the RSVP card. We did self addressed stamped envelopes for the RSVP and instead of putting our label in the recipient spot we put them in the sender spot (top left). I feel like such a fool! No wonder we haven't had any come back. I guess the good news is that we haven't sent out the ones for local guests. Those will be going this weekend and I will make sure they are done the right way this go around.