Establishing Parentage in Oklahoma Family law in Oklahoma generally recognizes equal opportunities for fathers and mothers alike to maintain parental roles with children regardless whether there is any ongoing relationship between the parents. Yet there remains one stark exception. Fathers of children born out of wedlock have virtually no parental rights until they establish parentage though a legal process. Tulsa FATHERS RIGHTS Lawyer 500 W. 7th St., Suite 115 Tulsa, Ok. 74119 Phone: (918) 986-7724 Fax: (918) 932-2900