N-600 documents a citizenship you already hold rather than granting one. Who derived it through a parent, who acquired it at birth abroad, and how to prove it.
Reviewed by Ekaterina Fitenko, Esq. — Florida Bar #1064536. With 20+ years of experience in the legal field, she advises families on acquired and derivative citizenship and on documenting a citizenship that already exists, in English and Russian.
Form N-600, Application for Certificate of Citizenship, documents a citizenship you already hold. It is not an application to become a citizen, and it is not naturalization. If the law made you a citizen years ago, the certificate is evidence of a fact that was true the whole time.
That distinction has practical weight. There is no test, no oath and no residence requirement, because none of those apply to someone who is already a citizen. There is also no deadline: a person can file at fifty for a citizenship acquired at eight.
The people this matters to most are the ones who never suspected it. They renew green cards, they worry about travel, some prepare to naturalize — and a few are in removal proceedings, which cannot lawfully be brought against a U.S. citizen. The question is worth answering before any of those steps, not after.
Under INA § 320, added by the Child Citizenship Act of 2000 and effective 27 February 2001, a child becomes a U.S. citizen automatically when four conditions are met at the same time: at least one parent is a U.S. citizen by birth or naturalization; the child is under 18; the child is a lawful permanent resident; and the child is residing in the United States in the legal and physical custody of that citizen parent.
Automatically is meant literally. On the day the last of those conditions falls into place, citizenship exists — no application, no ceremony, no notice from the government. The common pattern is a family that immigrated together, a parent who naturalized while a child was sixteen, and a child who has been a citizen ever since without anyone in the household realising it.
Each condition carries its own definitions, and the edges matter. Legal custody in the case of divorced or separated parents turns on the custody order rather than on who the child lives with informally. Adopted children are covered where the adoption meets the statutory requirements. Children who turned 18 before 27 February 2001 fall under the earlier version of the law, which was narrower and generally required both parents to naturalize.
A child born outside the United States can be a citizen from birth through a parent, under INA § 301 and related provisions. The requirement that decides most of these cases is the citizen parent's physical presence in the United States before the child was born.
For a child born abroad on or after 14 November 1986 to one U.S. citizen parent and one noncitizen parent, the citizen parent must have been physically present in the United States or its outlying possessions for five years before the birth, at least two of which after the age of fourteen. Births before that date fall under earlier rules with different totals, which is why the birth date governs which test applies.
Proving a parent's physical presence decades later is the real work in these cases. School transcripts, employment records, tax returns, social security earnings statements and immunisation records all serve, and they are easier to obtain while the parent is alive and able to help. Families who suspect this applies to them should gather the record now rather than when the certificate is needed.
Check if a parent naturalized while you were under 18 and you already had a green card. Check if you were born abroad to a parent who was a U.S. citizen at the time. Check if you were adopted by a U.S. citizen as a child, and check if a grandparent's citizenship has ever come up in the family without anyone pursuing it.
The reason this goes unnoticed is that nothing announces it. USCIS does not write to the children of people who naturalize, the green card in a pocket looks the same the day after as the day before, and a family that has spent years thinking in terms of applications does not stop to ask whether one of them stopped being necessary.
The cost of not asking is concrete: filing fees for renewals that were unnecessary, a naturalization application for a citizenship already held, and in the worst cases a removal proceeding against someone who cannot be removed. Where the facts are close to the line, this is a question for counsel and for the family's documents rather than for recollection — our citizenship and naturalization practice works through exactly this sequence.
A U.S. passport is itself proof of citizenship, and for many people it is the faster and cheaper document to obtain, issued by the Department of State on much the same evidence the N-600 would require. A Certificate of Citizenship is issued by USCIS, does not expire, and does not need renewal every ten years.
The two are not mutually exclusive, and there is a sound argument for holding both. The passport does ordinary work — travel, identification, employment verification — while the certificate is the document that settles the question permanently and survives a lost or expired passport without a fresh evidentiary showing.
Where the evidence is thin or the legal path is complicated, the certificate has an additional advantage: USCIS adjudicates the citizenship question and issues a determination, which is a more durable answer than a passport application handled at a counter. Where the evidence is straightforward, most families start with the passport and file the N-600 afterwards. Current filing fees for USCIS forms are in the USCIS fee schedule; the passport is priced separately by the Department of State.
Every N-600 is built from the same spine: proof of the parent's citizenship, proof of the parent-child relationship, and proof that the statutory conditions were met while the child was under 18. Everything else is supporting material.
In practice that means the parent's naturalization certificate or birth certificate or passport; the child's birth certificate naming the parent; the marriage certificate, and any divorce decree or custody order where the parents separated; and the child's permanent resident card with evidence of residing in the parent's custody before the eighteenth birthday. School enrolment records and medical records are the usual proof of that last element, because they place a child at an address in a given year.
Documents in another language need a certified English translation, and the standard is specific rather than general. Our guide to certified translations for USCIS sets out what the certification has to say. Foreign civil documents may also need to meet authentication requirements depending on the issuing country.
A different form covers a child who lives outside the United States and has not been a permanent resident here. Under INA § 322, a child residing abroad may apply through the U.S. citizen parent on Form N-600K, and the citizenship is granted rather than automatic — the child comes to the United States temporarily for the interview and the oath where one is required.
The physical presence requirement can be met through a grandparent in defined circumstances, which is the provision most families do not know exists. Where the citizen parent has not lived in the United States long enough, a qualifying U.S. citizen grandparent's presence may be used instead.
This route has to be used before the child turns 18, and that deadline is firm. Families abroad who are weighing whether to act often discover the option in the year it is about to close, so the calendar matters more here than anywhere else in the topic.
A documented citizen stops filing immigration applications. No green card renewals, no travel documents, no advance parole, no work authorization, and no naturalization application — the last of which USCIS will deny as unnecessary rather than approve, because there is nothing to naturalize.
The protections are the ones that matter most in a hard year. A U.S. citizen cannot be placed in removal proceedings or deported, cannot lose status through a long absence abroad, and can petition for relatives in categories closed to permanent residents. Citizen parents can also transmit citizenship to their own children born abroad, which is how one unanswered question in a family becomes two generations of unanswered questions.
If you are weighing naturalization and this article has raised a doubt, resolve the doubt first. The evidence for an N-600 and the evidence for an N-400 overlap heavily, so the work is not wasted either way, and our guide to naturalization covers the route that applies if it turns out you are not already a citizen.
Because you cannot prove it without a document. Citizenship under INA § 320 exists from the day the conditions are met, but employers, agencies and border officers ask for evidence, and a green card is evidence of the wrong thing. The certificate or a U.S. passport supplies the proof.
No. The conditions had to be met before your eighteenth birthday, but the application itself can be filed at any age afterwards. Adults in their forties and fifties file on facts that were settled decades earlier.
Possibly, and it is worth checking properly. INA § 320 requires that a parent be a citizen, that you were under 18, that you were a lawful permanent resident, and that you were residing in that parent's legal and physical custody in the United States. All four had to be true at the same time.
Often yes, and for many families it is faster and cheaper. A passport is proof of citizenship, but it expires and must be renewed; a Certificate of Citizenship does not. Many people obtain both.
No. The Act applies to children who were under 18 on 27 February 2001. Earlier cases are governed by the prior law, which was narrower and generally required both parents to naturalize, with exceptions for a surviving or custodial parent.
A denial can be appealed to the Administrative Appeals Office, and the underlying citizenship question can also be raised in other settings, including in immigration court where removal has been initiated. A denial is a determination about evidence, and a stronger evidentiary record can change the outcome.
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This article is informational only and is not legal advice. Form editions, fees and processing times change; confirm current requirements with USCIS before filing. Reading this page does not create an attorney-client relationship.
Fitenko Law PLLC, 11555 Heron Bay Blvd, Suite 277, Coral Springs, FL 33076 (main office); 600 Three Islands Boulevard, Hallandale Beach, FL 33009 (by appointment only). Phone: (305) 315-3425. Email: fitenkolaw@gmail.com