Now before the comments roll in, I know it is rude to not host a reception for guests. Let me explain...
My dad has asked that I invite some of his family to my wedding and I do not want them there. I have no personal connection with them and frankly, what i do know of them I do not like. I tried going the route and asking if he genuinely thought they would come even if I did invite them. My dad thinks they will. I tried going the route of telling him that his guests would add an extra $1,000 to the bill and leaving it with the unspoken deal of "if you pay for them then they can come" but i really don't want them to come. He didn't even take that.
So I was going to offer a compromise, if they truly wanted to come because I was getting married then I will invite them to the ceremony (where I won't really notice or remember them) but not the reception (where the cost lies).
I don't want to be super-obviously rude about it, so I was hoping someone would have a formal way of saying "you're not invited to the reception". but my goal is to be rude enough that they don't come. Once I am married I will never even associate myself with these people. I am only considering inviting them for my dad's sake - it has been the one thing he has asked of me.