Citizenship Application
Preparation assistance for the Application for Naturalization.
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Accurate & Reliable
Carefully reviewed and error-free
Language support
Communication in your language and English
Updates & Guidance
We keep you informed at every step
About this service
Form N-400 is the application eligible lawful permanent residents file to become U.S. citizens through naturalization. Eligibility generally turns on continuous residency, physical presence in the U.S., and good moral character standards set by USCIS, and the application itself asks in detail about your residency history, travel outside the U.S., and personal background over several years. Because a single unreported trip or inconsistent date can create problems at the interview, accuracy in reconstructing your history matters as much as the form itself. DocPrep helps you organize your residency and travel history into a clear, consistent record and prepares Form N-400 from the information you provide; we also give you general information about what to expect at the naturalization interview, though we don't administer the civics or English test.
Who this may apply to
- Lawful permanent residents who meet the continuous residency and physical presence requirements
- Applicants with a long or complicated travel history who need help reconstructing accurate dates
- Individuals preparing for the naturalization interview and civics test who want their paperwork in order beforehand
What DocPrep can help prepare
- Preparing Form N-400 based on your residency, travel, and personal history
- Organizing supporting documents needed for filing
- Reconciling travel dates and trip lengths into a consistent, accurate record
- Providing general information about what to expect during the interview process
How it works
- 1
Confirm basic eligibility timeline
We review the residency and physical presence dates you provide against the general naturalization timeline requirements.
- 2
Reconstruct your travel history
You provide your trips outside the U.S., and we help organize them into the dates and durations the form requires.
- 3
Gather supporting documents
We identify which supporting documents apply to your situation, such as your Green Card and any relevant civil records.
- 4
Prepare the application
We prepare Form N-400 from your confirmed residency, travel, and background information.
- 5
Review before filing
We go through the completed application with you and share general information about the interview process.
Documents you may need
Requirements vary depending on your situation. Commonly requested information may include:
- Permanent Resident Card (Green Card)
- Complete list of trips outside the U.S. since becoming a permanent resident, with dates
- Marriage certificate and spouse's citizenship information, if applying based on marriage to a U.S. citizen
- Tax filing history for the qualifying period
- Any court or arrest records, if applicable, regardless of outcome
Important notes
- Eligibility requirements — continuous residency, physical presence, and good moral character — are set by USCIS, and we prepare your filing based on the history you provide rather than making an independent eligibility determination.
- DocPrep does not administer the civics or English test and does not provide test tutoring; use official USCIS study materials to prepare for those portions of the interview.
- We do not guarantee application approval.
Why choose DocPrep
Accuracy-focused
Every form is prepared and reviewed against current agency instructions.
Plain-language guidance
We explain each step clearly, without unnecessary legal jargon.
Help when you need it
Reach our team by phone, email, or message with questions about your request.
Related questions
Naturalization is the process by which an eligible lawful permanent resident becomes a U.S. citizen. It's requested using Form N-400, Application for Naturalization. Eligibility generally requires meeting continuous residency, physical presence, and good moral character standards set by USCIS, along with passing the civics and English requirements at your interview.
We help you organize your residency history, travel history, and other supporting documents needed for Form N-400, then prepare the application based on the information you provide. The exact list depends on your background, so our team will confirm the specifics with you directly.
We can give you general information about the interview process and help make sure your documents are organized ahead of time. DocPrep does not administer the civics or English test, and we don't provide test preparation or tutoring — you'll want to use official USCIS study materials for that part.
Processing times are set by USCIS, the immigration court, or the relevant government agency, not by DocPrep. You can check current USCIS processing times using our Check Status tools or on the official USCIS website.
No. Government filing fees are paid separately to the relevant agency (such as USCIS) and are not included in our document preparation fee. We will let you know the applicable government fee for your filing before you submit it.
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Request a serviceThis service is document preparation assistance based on information you provide. DocPrep is not a law firm and does not provide legal advice or legal representation. Outcomes are determined solely by the relevant government agency.
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