U.S. Citizenship: A Comprehensive Legal Guide
from an Immigration Lawyer (2025)
By Arsen V. Baziyants, Las Vegas Immigration Lawyer — Practicing Immigration Law Exclusively Since 2008
Introduction: Citizenship Is Not One Process — It’s Several
In my experience practicing immigration law since 2008, one of the most common misconceptions I see is that U.S. citizenship is a single, straightforward process. In reality, citizenship can be obtained in several very different ways, each governed by its own legal rules, evidence standards, and risks.
Some people must apply for naturalization.
Others are already citizens — often without realizing it — through derivative or acquired citizenship, particularly children.
Still others qualify automatically under the Child Citizenship Act, without ever filing an application before age 18.
This guide is designed to explain all major paths to U.S. citizenship, how they work in practice, and where people commonly make mistakes.
Important: This guide is for general educational purposes only and does not replace legal advice from a licensed immigration attorney.
Overview: The Three Main Ways to Become a U.S. Citizen
Under U.S. immigration law, citizenship is obtained through one of three primary legal frameworks:
Naturalization — applying for citizenship as a lawful permanent resident
Citizenship at Birth (Acquisition) — born in the U.S. or born abroad to U.S. citizen parent(s)
Derivative / Automatic Citizenship — most commonly under the Child Citizenship Act of 2000
Each is discussed in detail below.
1. Naturalization: Citizenship Through Application
Naturalization is the process by which a lawful permanent resident (green card holder) applies to become a U.S. citizen using Form N-400.
Who Is Eligible for Naturalization
Most applicants must meet the following requirements:
Be at least 18 years old
Be a lawful permanent resident
Have maintained permanent residence for:
5 years, or
3 years if married to and living with a U.S. citizen
Have continuous residence and sufficient physical presence
Demonstrate good moral character
Demonstrate ability to read, write, and speak basic English (unless exempt)
Pass a civics test on U.S. history and government
USCIS outlines the naturalization framework here:
👉 https://www.uscis.gov/citizenship/learn-about-citizenship
2. The Naturalization Process: What Actually Happens
In practice, the naturalization process includes:
Filing Form N-400
Attending a biometrics appointment
Completing a naturalization interview
Taking the English and civics tests
Receiving a decision
Taking the Oath of Allegiance
What many applicants do not realize is that the interview is not just a test — it is a legal review of your entire immigration and personal history as reflected in your N-400.
In my practice, the content of the N-400 itself often determines how smoothly the interview goes.
3. Practical Preparation Tip (From Real Practice Experience)
Practical tip: I always advise clients to start preparing before they file — and preparation means more than studying civics questions.
For clients with limited English proficiency, early preparation is especially important. Waiting until after filing often creates unnecessary stress once the interview notice arrives.
One of the most effective preparation strategies I use is having clients complete their own Form N-400 as a draft. Of course, we carefully review, revise, and finalize it together before filing — either electronically or on paper.
In my experience, completing your own N-400 is the single most helpful way to prepare for the naturalization interview, even more than studying for the civics test alone. This is because:
The interview is based largely on your own answers
Officers often revisit or rephrase N-400 questions orally
Writing out your history helps you internalize it
It dramatically reduces confusion and inconsistencies
Clients who take this step almost always appear more confident and prepared at the interview.
4. The Civics Test: What Applies Today
USCIS currently administers the 2008 civics test, not the briefly introduced 2020 version.
Under the current test:
Applicants are asked up to 10 questions
6 correct answers are required to pass
Questions are drawn from a list of 100 official questions
The test is conducted orally
Although civics preparation is important, I routinely see interviews fail not because of civics, but because applicants struggle to understand or explain their own history — again reinforcing why drafting the N-400 early is so valuable.
5. Medical Exemptions (Form N-648): Clearing Up a Common Myth
Some applicants qualify for an exemption from the English and/or civics requirements due to a physical or developmental disability or mental impairment. This requires Form N-648, completed by a licensed medical professional.
There is a persistent myth that a lawyer can “get” a medical exemption. That is incorrect.
Only a qualified medical professional can determine eligibility
USCIS officers and immigration judges are not medical experts
A lawyer cannot create a diagnosis or argue medicine
The attorney’s role is limited to reviewing the doctor’s form for completeness, clarity, and consistency — nothing more. Beyond that, USCIS is not supposed to second-guess a legitimate medical opinion.
6. Citizenship for Children: Acquisition vs. Derivation
Many children are already U.S. citizens without needing naturalization.
Citizenship at Birth (Acquisition)
A child may acquire U.S. citizenship at birth if:
Born in the United States, or
Born abroad to at least one U.S. citizen parent who meets physical presence requirements
USCIS policy guidance:
👉 https://www.uscis.gov/policy-manual/volume-12-part-h
7. Derivative Citizenship & the Child Citizenship Act
Under the Child Citizenship Act of 2000, a child automatically becomes a U.S. citizen if all of the following occur before age 18:
At least one parent is a U.S. citizen (by birth or naturalization)
The child is a lawful permanent resident
The child resides in the U.S. in the legal and physical custody of the citizen parent
USCIS guidance on derivative citizenship:
👉 https://www.uscis.gov/policy-manual/volume-12-part-h-chapter-4
In my experience, many families mistakenly assume that a green card alone makes a child a citizen. It does not. Timing and custody matter enormously.
Most families later file Form N-600 to obtain proof of citizenship, even though citizenship itself may already be automatic.
8. Evidence USCIS Commonly Expects
Depending on the pathway, evidence may include:
Green card records
Parents’ naturalization certificates
Proof of legal and physical custody
School and residence records
Travel histories
Prior immigration filings
Incomplete or inconsistent evidence often triggers delays or Requests for Evidence (RFEs).
9. How Citizenship Interacts with Other Immigration Processes
Citizenship planning should not happen in isolation. In practice, it often overlaps with:
Adjustment of Status
👉 Legal Guide: https://lvimmigrationattorney.com/legal_guides/adjustment-of-status-guide/Affidavit of Support obligations
👉 Legal Guide: https://lvimmigrationattorney.com/legal_guides/affidavit-of-support-i-864-guide/
Understanding how these processes connect helps prevent future complications.
10. Final Thoughts from Practice
Citizenship is one of the most important legal milestones in a person’s life. Whether achieved through naturalization or automatically through parents, it permanently shapes a person’s rights, security, and future in the United States.
From my perspective as an immigration lawyer who has handled citizenship cases for over a decade, success comes down to early preparation, accurate documentation, and understanding which legal pathway actually applies.
Need Help with a Citizenship Case?
If you are unsure whether you need to apply — or whether you or your child may already be a U.S. citizen — consulting with an experienced immigration attorney can help clarify your options and avoid costly mistakes.