posted 7 months ago
The question does not seem clear as to the identity of the parents. It would seem that UK-British is one of them and no information is given as to the other. Likewise it talks about not wanting to leave UK and Ireland - when they are 2 distinct countries. Going to one requires leaving the other and vice versa.
It being unclear how the US connection is claimed or feared it is impossible to provide accurate information.
Generally speaking - A person born abroad in wedlock to two U.S. citizen parents acquires U.S. citizenship at birth under section 301(c) of the Immigration and Nationality Act (INA), if at least one of the parents had a residence in the United States or one of its outlying possessions prior to the person’s birth. In these cases, at least one of the U.S. citizen parents must have a genetic or gestational connection to the child to transmit U.S. citizenship to the child.
A person born abroad in wedlock to a U.S. citizen and an alien acquires U.S. citizenship at birth if the U.S. citizen parent has been physically present in the United States or one of its outlying possessions prior to the person’s birth for the period required by the statute in effect when the person was born (INA 301(g), formerly INA 301(a)(7)).
A person born abroad out-of-wedlock on or after November 14, 1986 to a U.S. citizen father and an alien mother may acquire U.S. citizenship under 301(g) of the INA, as made applicable by the “new” Section 309(a) of the INA, if:
A blood relationship between the person and the father is established by clear and convincing evidence.
The father was a U.S. citizen at the time of the person’s birth;
The father (unless deceased) has agreed in writing to provide financial support for the person until he or she reaches the age of 18 years; and
While the person is under the age of 18 years:
the person is legitimated under the law of his/her residence or domicile, or
the father acknowledges paternity of the person in writing under oath, or
the paternity of the person is established by adjudication of a competent court.
If the child was born abroad out-of-wedlock on or after November 14, 1986 to a U.S. citizen father who satisfies the requirements of the “new” INA 309(a) as listed above, the child will acquire U.S. citizenship if the U.S. citizen father was physically present in the United States or one of its outlying possessions for five years prior to the person’s birth, including at least two of which were after turning age 14.