My son ex girlfriend said my son was the father of her baby. He was involved during the pregency and birth. He also signed the birth certificate. A week later she told him he was not the father. She is very uncooperative and refuse to get a paternity test done. What must he do to get a court order paternity test? We have been getting alot of run around with the Social Services/Child support stating he already establish paternity by signing the birth certificate. What can we do?