So even though our RSVP deadline is not until Oct 31, we asked my FMIL to start making calls. Out of the 100 people they invited, less than half have even responded so we are like 40 people under our minimum so we don't want to wait until the last second to try and find 'seat fillers.'FMIL made a stink about calling early, which I understand, but the reason my mom is insisting she start is that apparently for my shower, over 10 (out of 25) of HER guests NEVER rsvped and did not return her phone calls until the day before the shower to say they WERE coming. We can't have them deciding the day before that they are coming!FI just texted me about 2 relatives (and they are not old) who ARE coming but "don't expect the rsvp to come back" so I asked him what they were planning to do if his mom did not call, just show up to the wedding and hope they had a seat and he said that they would probably not come unless they got a 'personal phone call'WTH??? Sorry if I am being a beebee, it is just so annoying.