While I would feel a little disappointed with "no", I wouldn't call them up . An RSVP is just that - if they say no, then they're not coming for one reason or another. I don't expect my guests to have to justify why they're not coming by way of
an excuse.
The other thing I don't agree with is :
Half RSVPs -
Another RSVP gripe is if you actually do receive the RSVP for an invitation which allows for one guest to accompany the recipient - but the recipient doesn't inform you that a guest will also be coming. This can make it difficult to
get an accurate head count for the food, favors, etc. If you aren't sure whether the recipient is bringing a guest to the wedding, always assume that they are. Again, having too many chairs and places is better than not having
enough.
Our reception dinner is costing approx. $150 per head. I certainly don't want to be paying $150 a head on the offchance that the 'guest' is coming, or be faced with empty seats at tables. I would much rather call and verify rather than
assume.