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N-400 vs. N-600: What’s the Difference? 🇺🇸
Many people confuse Form N-400 and Form N-600, but they serve two very different purposes.

Form N-400 – Application for Naturalization

* Used by lawful permanent residents (green card holders) who want to become U.S. citizens.
* Applicants must meet eligibility requirements, such as residency, physical presence, and good moral character.
* If approved, they take the Oath of Allegiance and become U.S. citizens.

Form N-600 – Application for Certificate of Citizenship

* Used by individuals who are already U.S. citizens by birth to U.S. citizen parents or through derivative/acquired citizenship and need official proof of their citizenship.
* This form does not make someone a U.S. citizen—it only requests a Certificate of Citizenship as evidence of citizenship.

In simple terms:�N-400 = Becoming a U.S. citizen.�N-600 = Proving you are already a U.S. citizen.

Understanding which form applies to your situation can save time, money, and unnecessary delays. If you’re unsure which process fits your circumstances, it’s important to review your eligibility carefully before filing.

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Checklist for marriage-based green-card. Here are some pieces of evidence to consider when filing for your marriage-based green card. The list is non-exhaustive.

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This is general information, not legal advice.

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AB Legal Consult represents clients nationwide across all 50 states.
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Form I-485 ➡️ It’s your ticket to Lawful Permanent Residence, but someone needs to file an immigrant petition for you. In some cases, you can apply for yourself.

Form I-130 ➡️ This is where it all begins! If you’re a U.S. citizen or green card holder, use it to help a family member apply for a green card, proving that they’re your immediate family.

Understanding these forms is the first step in your immigration journey!

Call us at 703-705-9905 for your immigration needs.