Since the OP was born before 1986, if his father was a citizen at the time of his birth and his mother was a non-US-national, his father would have needed to have been physically present in the US for a cumulative total of 10 years before his birth, including 5 years after turning 14.@newacct If OP’s father was a US citizen by birth living in the US, wouldn’t OP be a US citizen by birth as well per INA 301/309 regardless of his place of birth? why would his father need to petition him for a GC? Anyway, since OP will be getting an attorney, I’m sure he will figure it out