The RSVP date for LO's birthday party is coming up and there are still a lot of people who have yet to respond. I don't really want to track anyone down but it will likely affect our food cost so I'll probably have to, or is that tacky?

Were people good about RSVPing to your LO's birthday party, or did you not require a response either way?

How do you handle the ones you do not hear back from?