Your situation sucks and i can understand. I am in a similar situation myself but count yourself lucky he does not contact her. Count it as a loss if you want but to me you have a gain. You are the one who your daughter sees and looks up to not him. I dont understand why it is always about the money. I offered my ex husband to give up all rights to our daughter in return of no child support. Its tough but now she will never grow up with his dissappointments. I never speak a bad word to her about him and she still thinks the world of him. She is 5 and does not know any better. He calls her every few months and he fly's here once a year and spends a few hours with him. I hate him more than anything but now he has nothing for her. I could refuse him visitations but that is what is best for me. As you said they will learn when they get older and eventually the sperm donor will get what he deserves. I some how make ends meet working part time with no government assistance. We dont have cable or internet at the house and we find fun free things to do. I dont want to waste precious time fighting someone in court. Life is too short move on and focus on the possitive!