I have a very big extended family that lives in the neighboring state. I know very few of them and the ones I do know I don't know well. We are having a small wedding with close family menbers and a few friends only. I found out that many of these extended family members may be planning to come to my wedding even though none of them were invited. My venue is small, even if I wanted these people there (which I don't) there is no room for them. How do I prevent these people from coming?!? I don't have any contact info for them.