Problem: The difference between legitimation and paternity is: a paternity action is concerned with establishing the biological fatherhood of the child while a legitimation action is concerned with the legal relationship between the father and the child. a paternity action is concerned with establishing the legal relationship between the father and the child while a legitimation action is concerned with establishing the biological fatherhood of the child. only a legitimized child is entitled to receive support from the father. there is no difference - these are two names fo the same thing. Looking for Assignment Help?