Q: Someone uninvited has requested to attend a party that I am hosting. I was very careful in my choice of guest for this particular party. Can I politely decline the request?
A: Sure. Just say you are sorry, but you are at your guest limit this time and while you are flattered that he/she would like to be there, you just can’t do it. No one should ask for an invitation to a private party, so it is perfectly fine to decline the request.