* If someone hasn't responded to your invitation, 1 week past the "Reply by" date, call him or her and confirm over the phone.
* Children over the age of 16 get their own invitations. (FB thinks 18 is sufficient)
* Your officiant and their better half get an invitation
* Send your parents and wedding party invitations, as a keepsake. They don't have to reply.
* You have to put return postage on your RSVP's if they are to RSVP by mail.