Well, if it's not in your contract, it's not a change of contract, so technically there is no notice to be given. However, then you still have a problem in that it could be called false advertising if you wrote it in your adds to attract clients. I'm not really sure what to suggest because if I were a parent who had signed on with you because of the low number of kids that you promised, I would not be happy if you now changed that. However, as Judy said, businesses change and they can leave if they are no longer happy...we get notices about rate increases, changes to service etc on our cables bills and whatnot...if we don't like it, we take our business elsewhere. You could give them 4 weeks notice and try to work with the family who is against it to help them see the positives and to get them to at least give it a try.