My father left me when I was 3 years old. He came to the U.S.A. He then when I was 21 years old he gave legal status in the U.S.A. I am leaving in the U.S.A since 2002 and I have not heard of him. I am his first child and I have a sister from the second marriage of my father. My question is. If my father dies and I am not included in his will, can I fight for at least a bit of his fortune knowing that I am his first child? I am 34 years old.