N-600 Certificate of Citizenship
Documenting Derivative and Acquired Citizenship for Children and Adults
Many people are U.S. citizens without knowing it — through a parent's naturalization (INA § 320), birth abroad to a citizen parent (INA § 301), or other derivative paths. The firm analyzes citizenship claims, files Form N-600, and represents clients at USCIS field offices in Hartford and Albany.
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N-600 certificate of citizenship — quick answer
Form N-600 (Application for Certificate of Citizenship) documents citizenship that already exists — it does not grant new citizenship. Under INA § 320 (Child Citizenship Act of 2000), a child born outside the U.S. automatically becomes a citizen when: (1) at least one parent is a U.S. citizen; (2) the child is an LPR; and (3) the child resides in the U.S. in the legal and physical custody of the citizen parent — all before the child's 18th birthday. Citizenship acquired at birth abroad is governed by INA §§ 301 and 309, with the law in effect at the time of birth controlling. Filing fee: $1,385 (paper) / $1,335 (online) — confirm at uscis.gov/n-600.
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Our Services
N-600 Certificate of Citizenship Services We Provide
- N-600 eligibility analysis — derivative citizenship under INA § 320 (Child Citizenship Act)
- Acquired citizenship at birth analysis under INA §§ 301 and 309
- N-600K preparation for children residing outside the United States (INA § 322)
- USCIS interview preparation for N-600 at Hartford and Albany field offices
- Complex parentage analysis — stepchildren, adopted children, children born out of wedlock
- Citizenship claims for adults who derived citizenship as children
- Coordination with U.S. passport applications following N-600 approval
Documents
What you'll need to file Form N-600
Gather these documents before filing. USCIS requires originals or certified copies at the interview.
- • Applicant's birth certificate (foreign) with certified English translation
- • U.S. citizen parent's naturalization certificate (Form N-550/N-570) or U.S. passport
- • Applicant's permanent resident card (Form I-551 / green card)
- • Evidence of U.S. residence at the time citizenship was claimed to have derived (utility bills, school records, lease)
- • Evidence of legal and physical custody of the U.S. citizen parent at the relevant date
- • Marriage certificate of parents (if citizenship derives through married parents) or evidence of legal name
- • Adoption decree if applicable — with evidence of legal adoption under state law before age 18
- • Prior Certificates of Naturalization or Citizenship for any parent in the derivation chain
- • Passport photos (per USCIS N-600 instructions)
- • Any prior USCIS or immigration court records, prior visas, or I-94 records for the applicant
Our Process
How We Handle Your N-600 Certificate of Citizenship Case
- 1
Citizenship Eligibility Analysis
We trace the derivation path — birth abroad (INA §§ 301/309) or automatic derivation through parent's naturalization (INA § 320 / CCA) — and confirm all statutory conditions were met simultaneously before the applicant turned 18.
- 2
N-600 Preparation & Filing
We prepare Form N-600 with complete supporting documentation: birth certificate, parent's naturalization certificate or U.S. passport, LPR card, evidence of U.S. residence and legal/physical custody at the relevant date.
- 3
USCIS Interview
USCIS typically schedules an in-person interview at the Hartford or Albany field office. We prepare clients for document review, parentage questions, and any legal issues raised by the officer.
- 4
Certificate of Citizenship Issuance
Upon approval, USCIS issues Form N-560 (Certificate of Citizenship). We assist with any post-approval steps including U.S. passport application and correction of any records reflecting prior non-citizen status.
Common pitfalls
Where N-600 cases go sideways
Parent naturalized after child turned 18
The Child Citizenship Act of 2000 only applies if all three conditions under INA § 320 were met before the child's 18th birthday. If the parent naturalized even one day after the child turned 18, automatic citizenship did not occur — the child must naturalize independently.
Legal custody was not with the citizen parent
INA § 320 requires legal and physical custody with the U.S. citizen parent. Children living with a non-citizen parent following divorce or separation — even if the other parent is a citizen — may not have derived citizenship, depending on the custody arrangement at the time of naturalization.
Misreading the law in effect at birth
Acquired-citizenship rules under INA §§ 301 and 309 have changed multiple times since 1934. The law in effect at the time of the child's birth controls — not current law. An attorney must trace which version of the statute applies to each case.
Assuming N-600 is automatic and unfiled
While citizenship may be automatic under INA § 320, it is undocumented until Form N-600 is approved and a Certificate of Citizenship is issued. Without official documentation, a person may face obstacles obtaining a U.S. passport, employment authorization, or government benefits.
Costs & fees
Filing fees for N-600
Per the 2024 USCIS fee rule (89 FR 6194). Fees are subject to change — confirm current fees at the official USCIS page for each form before filing. Attorney fees vary by case complexity.
N-600 (Paper)
$1,385
Application for Certificate of Citizenship — paper filing; confirm current fee at uscis.gov/n-600
N-600 (Online)
$1,335
Application for Certificate of Citizenship — online filing; confirm current fee at uscis.gov/n-600
N-600K
$1,385
Application for Citizenship and Issuance of Certificate Under Section 322 — for children residing abroad; confirm at uscis.gov/n-600k
By the numbers
Tens of thousands of people in the United States are U.S. citizens without knowing it — having automatically derived citizenship when a parent naturalized before their 18th birthday.
Source: USCIS Policy Manual Vol. 12 on Citizenship and Naturalization. Many individuals carry green cards or foreign passports for years after automatically becoming citizens under INA § 320. Filing an N-600 creates an official record, prevents removal proceedings, and enables a U.S. passport.
“A child born outside of the United States automatically becomes a citizen of the United States when all of the following conditions have been fulfilled: (1) At least one parent of the child is a citizen of the United States, whether by birth or naturalization. (2) The child is under the age of eighteen years. (3) The child is residing in the United States in the legal and physical custody of the citizen parent pursuant to a lawful admission for permanent residence.”
— Immigration and Nationality Act § 320(a), 8 U.S.C. § 1431(a) (Child Citizenship Act of 2000)
FAQ
Certificate of Citizenship FAQ
What is derivative citizenship under the Child Citizenship Act?
The Child Citizenship Act of 2000 (CCA) amended INA § 320 to provide that a child born outside the United States automatically acquires U.S. citizenship when three conditions are met simultaneously: (1) at least one parent is a U.S. citizen by birth or naturalization; (2) the child is a lawful permanent resident; and (3) the child is residing in the United States in the legal and physical custody of the U.S. citizen parent. Citizenship is automatic — the N-600 simply documents this existing status.
Does my child need to be under 18 for derivative citizenship?
Yes. Under INA § 320, derivative citizenship under the CCA applies to children under 18 years of age who meet the three statutory conditions. If the child was 18 or older when the last condition was met (typically a parent's naturalization), the child did not automatically acquire citizenship under the CCA and must pursue naturalization independently.
What is acquired citizenship at birth under INA § 301?
INA §§ 301 and 309 govern citizenship acquired at birth for children born outside the United States to at least one U.S. citizen parent. Eligibility depends on the parents' citizenship status at the time of birth, whether one or both parents were citizens, and whether the U.S. citizen parent met the physical presence requirements in the U.S. prior to the child's birth. These rules have changed over the decades — the law in effect at the time of the child's birth controls.
When should I file an N-600 versus just using existing documentation?
An N-600 is not legally required if a person already has documentation proving citizenship (passport, prior certificate). However, a Certificate of Citizenship (Form N-560) serves as definitive proof, prevents future questions, and is useful for obtaining a U.S. passport, employment verification, and other official purposes. USCIS strongly recommends filing to obtain official documentation.
What is Form N-600K for children residing abroad?
Form N-600K (Application for Citizenship and Issuance of Certificate Under Section 322) is for children who reside outside the United States but have a U.S. citizen parent who meets certain U.S. physical presence requirements under INA § 322. The N-600K process involves a USCIS interview, and the child temporarily enters the U.S. to take the oath. The filing fee is $1,385 — confirm at uscis.gov/n-600k.
What are common obstacles in N-600 cases?
Common issues include: parent naturalized after the child turned 18; child was in the legal custody of a non-citizen parent at the time of the parent's naturalization; child was adopted rather than born of the marriage; prior immigration orders or removal proceedings that cloud status; and complex parentage situations (stepchildren, children born out of wedlock). An attorney can review whether citizenship attached and when.
Frequently Asked Questions
N-600 Certificate of Citizenship FAQ
Related Topics
Related Immigration Topics
- Citizenship & Naturalization — Overview of citizenship services
- N-400 Naturalization Application — For LPRs who must naturalize rather than file N-600
- Child Immigration — Family petitions for children
- Immigration Appeals — Administrative and federal court review of denied N-600
- Schedule a Consultation — Citizenship derivation analysis
Talk to an immigration attorney
Get clear answers about your immigration case
Schedule a confidential consultation with M. Riaz Musani. Offices in West Hartford, CT and Latham, NY. Multilingual representation in five languages.