I get married next week. And an uncle of DF's refuses to RSVP. He's like I don't know if I'll be there or not.
And its not where he lives so he has to book tickets? But he still doesn't know.
He stopped answering calls/emails too. Even from DFs Mum. But we weren't exactly harassing him either. Maybe 2 calls and 2 emails since June 30th which was final RSVP date.

So at this point we're assuming he's not coming, cause we can't even chase him up.

But I worry cause I have to give final numbers to reception venue today, and if he turns up with wife and a kid or two in tow, its kind of going to be bad.
So I still don't know if I'm making the right choice? Haha.
My BIL had an uncle that was the same. Would not RSVP and would often bring along extra family who were not invited if he did rock up. In the end the whole extended family had enough and agreed that if he did not RSVP then they were not to cater to him. So one day he did rock up to a wedding, along with extras. A huge fuss was made and they were basically embarrassed in front of everyone who was there (can't remember whether they were told to go, or if they did arrange extra seating and made it very obvious the trouble it caused). He was shown how bad it was to not RSVP, so did the right thing from then one.

I would just not cater for them. Have someone prepared to pull them up before the reception and explain the situation so you are not the one to do it on the day. No RSVP, no seat.

Oh, just a thought, is there a way of contacting his wife directly?