I'm asking this for a family member. He was 4 when he arrived in the US, born in Mexico, father was born in Texas, Grandfather lived in Texas most of his life. The" family member" has married twice, both to US citizens and has 3 daughters, has been educated and worked in the US all his life. The problem is he has no birth certificate and he can not get a passport. What does he need to do? Get a lawyer?