I'm assuming your father was born outside the US? When was your father born? Was your father born in wedlock or out of wedlock? How long did your father's father spend in the US before your father's birth, and at what ages? Was your father's mother not a US national?I ama naturalized citizen since 08 . I am wanting to bring my elderly father over , my fathers father was born in USA but my father never did anything with it , would he be able to get citizenship on his fathers merit , we have his birth certificate?