My son's x girlfriend has moved to Poland with their son. She says she needs the father to relinquish his parental rights in order to facilitate public aid and other important documents. How can we do this? He is willing. He has never seen the child and due to cercumstances with X wants nothing to do with them.

If he is in the US, he can not under US law, I do not know of law in Poland allows this, but he can work with an attorney in Poland to see if possible

How did she get out of the country without his permission? Was this from the U.S. to Poland?