My daughter is my Copy on female Version. I can not deny her. Yes, with money it would be possible, but it would be running against walls! Because if government people don't want, they find ways and reasons that they don't want. A government is the worse thing you can have against you, none of them are Justice Systems!
Discussion
People do that often enough to prove they are not the father, why not to use it to prove the opposite? This cannot be so unheard of to cost that much money or to be too difficult to do.