When you apply for U.S. citizenship, USCIS may now talk to your neighbors, co-workers, or employer before your interview. A character reference letter for naturalization gives USCIS that same information on paper. Sending at least two letters with Form N-400 can help USCIS decide it doesn't need to visit.
The letters are optional, and you can ask people you already know to write them. This guide explains who should write them, what each letter must include, and how to send them with your application.
What You'll Learn
- What a neighborhood investigation is and who USCIS may contact
- How reference letters can help USCIS skip the neighborhood visit
- Who should write your letters and who USCIS won't consider
- A checklist to confirm each letter has every required item
- Why real examples and accurate details make a letter stronger
- How to include the letters with a mailed or online N-400
USCIS May Contact People Who Know You Before Your Interview
A neighborhood investigation is a USCIS check in which an officer talks with people who know you to confirm details from your naturalization application. USCIS brought these investigations back in a policy alert dated August 25, 2026. Unless USCIS waives it, the investigation applies to every applicant.
The investigator may speak with neighbors, landlords, local business owners, supervisors, co-workers, and business clients. The questions cover the past five years or more, including your residences, work history, family status, travel, and reputation in the community. USCIS generally finishes the investigation before scheduling your naturalization interview.
The purpose is to confirm what you wrote on Form N-400 and to help USCIS assess good moral character, the standard of conduct every citizenship applicant must meet.
From our experience, most N-400 applicants haven't heard about neighborhood visits at all. Our customers are looking for every opportunity to strengthen their applications and improve the chances that USCIS skips the visit.
A Character Reference Letter for Naturalization Can Help USCIS Waive the Visit
USCIS may waive the neighborhood investigation when an applicant sends enough testimonial or character reference letters. The USCIS Policy Manual chapter on naturalization investigations says that sending at least two letters with Form N-400 can help USCIS make that decision.
A waiver is not automatic. USCIS weighs the letters with everything else in your file and decides case by case. It may also ask for more evidence before deciding.
Skipping the letters has a cost, however. USCIS states that an applicant's failure to provide the letters may contribute to a decision to conduct the investigation. At the same time, USCIS says that missing letters alone can't justify finding that you lack good moral character.
If you're applying through U.S. military service, USCIS will also consider that service when deciding whether to waive the investigation.
The Best Letter Writers Know You Well and Are Not Your Relatives
USCIS prefers letters from U.S. citizens who personally know you. Good choices include neighbors, employers, co-workers, and business associates. If those are hard to find, CitizenPath suggests looking to co-workers, friends, and religious leaders who have known you for a meaningful length of time.
USCIS will not consider letters from your immediate family or other relatives. A letter from a cousin or an aunt adds nothing, so save your requests for people outside the family.
Writers don't have to be U.S. citizens. The Immigrant Legal Resource Center (ILRC), a national immigration nonprofit, notes that green card holders and people with other lawful status, such as H-1B workers or asylees, can also write letters. However, the ILRC recommends that a person without lawful immigration status not write one.
Each Letter Should Check Off Every Item on the USCIS List
USCIS lists several things every character reference letter should include. This checklist breaks them into five items you can confirm before you accept a letter from a writer:
- Writer's contact details: full name, home address, phone number, and email address.
- Writer's status: a statement that the writer is a U.S. citizen, green card holder, or other status, plus a copy of proof.
- The relationship: how the writer knows you and for how long, such as "neighbors since June 2021."
- Specific examples: real things the writer has seen you do that show honesty, integrity, and community involvement.
- A direct statement: an explicit sentence about your good moral character and your attitude toward the United States and the U.S. Constitution.
The ILRC's template also has the writer sign and date the letter. For proof of status, the ILRC's practice alert and letter template suggests a copy of a U.S. passport, birth certificate, or naturalization certificate for citizens and a copy of the green card for permanent residents.
To see what a finished letter looks like, download CitizenPath's sample N-400 character reference letter. The sample uses a fictitious applicant and writer.
Specific, Accurate Letters Carry More Weight Than General Praise
USCIS officers may weigh the credibility, detail, and relevance of each letter. A sentence like "She is a good person" gives the officer nothing to weigh. A sentence like "She has coached my son's soccer team every Saturday since 2022" does.
Good examples describe things the writer saw firsthand:
- volunteering at school, youth sports, or a place of worship
- reliability and honesty at work over several years
- helping neighbors, such as driving someone to appointments
- everyday trustworthiness, such as returning borrowed items or holding a spare key
The letter's facts should also match your application. USCIS uses the investigation to validate the residences, employers, and dates on Form N-400. If a neighbor writes that you've lived next door since 2019 but your application says you moved in during 2021, that mismatch raises a question you don't need. Before you file, confirm that information shared in the letters is consistent with your application.
Submit the Letters With Your Form N-400
USCIS guidance is to send the letters with Form N-400, so plan to have them ready before you file. The ILRC advises writers to return the signed letter to you rather than mail it to USCIS themselves.
How you include the letters depends on how you file:
- Filing by mail: place each letter and its proof of status with your other supporting documents in the N-400 package.
- Filing online: upload each letter and its proof of status as evidence during the filing steps. USCIS's tips for filing forms online list the accepted file types and size limits.
Keep a copy of every letter for your records. The letters fit alongside the other documents on CitizenPath's N-400 document checklist, which covers the evidence USCIS expects with your application.
Questions CitizenPath Customers Ask About Character Reference Letters
These questions reflect what people preparing Form N-400 ask as they learn about the new USCIS guidance.
Line Up Two Letters Before You File Form N-400
Two letters from people who know you well are one of the simplest ways to strengthen a naturalization application. Ask your writers early, share your key dates with them, and check each letter against the USCIS list before you file. The naturalization interview comes next, and arriving with a consistent, well-documented application puts you in a good position for it.
Ready to apply for citizenship? CitizenPath's Naturalization Application Package walks you through Form N-400 step by step, so your application package is complete and correct.
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