Due to the coronavirus epidemic, I am postponing my wedding. I am planning on sending out postponement notices. Does anyone have any ideas how to properly word this? I will include the updated date, time, location and RSVP by date. I have already received about half of my RSVPs. Should I just include a note that if someone already RSVP'd yes/no and needs to change their answer to just text or call me? Our wedding is pretty casual and we're on a budget, so I would prefer not to send out new stamped return envelopes if it doesn't seem necessary.