Who Qualifies for an N-600 Certificate of Citizenship?

If your parent became a U.S. citizen while you were under 18, you held a green card, and you lived in the United States in that parent’s custody, you became a citizen automatically on the day the last of those three conditions was met. No application was required and no oath was taken. Form N-600 does not make you a citizen; it asks USCIS to recognize that you already are one and to issue a Certificate of Citizenship as permanent proof. This post explains the two routes to citizenship through a parent, who qualifies for an N-600 certificate of citizenship, and the evidence USCIS expects.

Two routes: citizenship at birth, or citizenship after birth

U.S. law treats children of citizens in two groups. A child born abroad may acquire citizenship at birth under INA 301 or 309 if the citizen parent had enough physical presence in the United States before the child was born. A child who was not a citizen at birth may derive citizenship later under INA 320, as amended by the Child Citizenship Act of 2000, once the child has a green card and lives with a citizen parent. Both groups use Form N-600, and both are routinely overlooked. Our citizenship and naturalization team checks the claim for every client whose parent naturalized while the client was a minor, because an adult who files an N-400 when already a citizen wastes a fee and an interview.

Automatic citizenship under INA 320

Since February 27, 2001, a child under 18 becomes a citizen automatically when all three of these facts are true at the same time: at least one parent is a U.S. citizen by birth or naturalization; the child is a lawful permanent resident; and the child resides in the United States in the legal and physical custody of the citizen parent. The order does not matter. A child who got a green card first and whose mother naturalized later became a citizen on the mother’s oath date. A child whose father was already a citizen became a citizen on the day the child entered the country as a permanent resident.

Adopted children qualify if the adoption was full and final before age 18. Stepchildren do not qualify through a stepparent, because the statute requires a parent-child relationship recognized by immigration law. Children who had already turned 18 on February 27, 2001 fall under the older rules in former INA 321, which usually required both parents to naturalize, or the sole surviving parent, or the custodial parent after a legal separation, while the child was a minor permanent resident. Those older cases are harder to document but no less valid.

Citizenship at birth abroad under INA 301 and 309

Acquisition at birth depends on the law in force on the child’s birth date. For a child born abroad after November 14, 1986 to one citizen parent and one non-citizen parent, the citizen parent must have been physically present in the United States for five years before the birth, at least two of them after age 14. For births before that date the requirement was ten years, five after age 14. When both parents were citizens, one of them needs only a prior residence in the United States. Children born out of wedlock to a citizen father face the extra steps of INA 309: proof of the blood relationship, the father’s written agreement to support the child until 18, and legitimation or acknowledgment before the child turned 18.

The proof problem in these cases is the parent’s physical presence decades ago. School transcripts, Social Security earnings records, tax transcripts, military records, employment letters and old passports all count. Children born in the United States need none of this; our post on the birthright citizenship ruling explains why.

N-600 or a U.S. passport?

A U.S. passport from the Department of State and a Certificate of Citizenship from USCIS are both proof of citizenship. The passport application is usually the quicker document to obtain and is what most people need day to day. The certificate never expires, is accepted without question by agencies that sometimes push back on derivative passport claims, and remains in your file as a permanent record. Many families do both: passport first for travel, N-600 afterward for the permanent record. A child who lives abroad with a citizen parent and does not hold a green card uses a different form, N-600K under INA 322, which must be filed and approved before the child turns 18 and requires a trip to the United States for the interview.

Evidence checklist for Form N-600

Build the file around the three statutory conditions and the dates they were met:

• Your birth certificate, with a certified translation if not in English.
• The citizen parent’s naturalization certificate, U.S. passport, or birth certificate.
• Your green card, or the immigrant visa and passport stamp from your admission.
• Proof of legal custody where the parents were divorced or never married: a custody order, divorce decree, or a parent’s death certificate.
• Proof you lived with the citizen parent before 18: school records, leases, medical records, tax returns listing you as a dependent.
• For adoption cases, the final adoption decree; for INA 309 cases, the legitimation or acknowledgment documents.

Mistakes that delay or defeat the claim

The most common error is assuming a parent’s naturalization alone was enough. A child who was still waiting for a green card when the parent took the oath, and who got the card after turning 18, did not derive citizenship and must naturalize on their own. The second error is guessing dates. The custody and residence facts must have coincided before the eighteenth birthday, so gather the parent’s oath date and your green card date before concluding anything. The third is ignoring the claim entirely in removal proceedings, where a valid derivation claim ends the case. Families bringing a child to the United States should also read about the child green card process, since the green card is the step that starts the INA 320 clock, and our overview of the path to U.S. citizenship covers the naturalization route for those who do not qualify automatically.

If you think you may already be a citizen through a parent, a consultation with Capitol Law Partners can confirm the dates and choose between an N-600 and a passport application. Schedule a consultation.

This article is for informational purposes only and does not constitute legal advice. No attorney-client relationship is formed by this communication.

Attorney Sena Sahin. Clear advice for individuals, families, and business owners.

Need help with this topic? See our citizenship through a parent and N-600 page or schedule a consultation.