Q: If I was under 18 when I came to the US on a green card but my father is a US citizen, I'm i a citizen Now I'm over 18?

A: Provider you and your father meet all other requirements and he became a USC when you were under the age of 18; you are a USC. File the N-600 to receive a Certificate.

A: Depending on a number of factors, including but not limited to whether your father was a U.S. Citizen prior to your 18th birthday, you may have automatically acquired U.S. Citizenship before your 18th birthday. What would be best is for you to schedule a consultation with a competent and experienced immigration attorney who can evaluate your facts and documents to make an informed opinion. Gather your birth certificate, your father's proof of U.S. Citizenship (e.g., birth certificate if born in U.S., consular report of birth abroad if born abroad, U.S. naturalization certificate if he is a naturalized U.S. Citizen), your parents' marriage certificate (if applicable), your parents' divorce judgment (if applicable), and, if your mother ever had any type of U.S. immigration status (e.g., legal permanent residency, citizenship), proof thereof. By asking you a series of questions and reviewing your documents, a good attorney should be able to determine whether you have a good claim to citizenship.

The government filing fee for this type of case is steep ($1170) and U.S. Citizenship & Immigration Services will only accept this type of case once. If one files this type of case and receives a negative decision from USCIS, then the agency will reject (not accept) any subsequently filed case. It is therefore advisable that you have a competent immigration attorney give you his or her professional opinion.

Many law firms, including mine, are offering online video or telephonic consultations during the COVID-19 pandemic. Good luck to you.