Updated: August 26, 2026
For San Diego residents who have already filed Form N-400, Application for Naturalization, or are preparing to apply for U.S. citizenship, an important policy change took effect this week.
On August 25, 2026, U.S. Citizenship and Immigration Services (USCIS) announced a significant change in how it may investigate applicants for naturalization.
USCIS has ended its decades-long general waiver of so-called “neighborhood investigations” — additional investigations that may involve an applicant’s residence, employment, and people who know the applicant.
Although federal immigration law has long provided authority for these investigations, USCIS notes that the agency had generally waived them since 1991.
Now, USCIS officers may once again determine that a neighborhood investigation is appropriate in an individual N-400 case.
But there is an important distinction:
The new policy does not mean USCIS will visit the home, workplace, or neighbors of every citizenship applicant.
Instead, USCIS says these decisions will be made on a case-by-case basis after reviewing the individual application and available evidence.
Before the new policy, USCIS generally waived neighborhood investigations for naturalization applicants.
That blanket approach has now ended.
When reviewing an N-400 application, USCIS may determine whether the information already available is sufficient to establish eligibility for naturalization or whether additional investigation is warranted.
According to the USCIS policy memorandum, these investigations may be used to verify whether an applicant meets the legal requirements for naturalization.
That may include information related to:
The key change is not that every applicant will now undergo an investigation. Rather, USCIS has restored its ability to use this investigative tool when officers believe additional verification is appropriate.
Not necessarily.
This is where some headlines and social media posts can create unnecessary confusion.
The August 25 policy does not establish mandatory home visits for everyone applying for U.S. citizenship.
USCIS states that officers will determine whether to conduct or waive a neighborhood investigation on an individual, discretionary basis after reviewing the facts of the case.
This means two people applying for naturalization through the San Diego USCIS Field Office could potentially have very different experiences.
In one case, USCIS may determine that the N-400, supporting documents, background checks, and interview provide sufficient information.
In another case, an officer may decide that additional verification is necessary.
One of the most notable parts of the new policy involves testimonial letters.
According to USCIS, applicants may be asked to provide additional evidence that could help the agency determine whether a neighborhood investigation is necessary.
This may include testimonial letters from people who know the applicant, such as:
These individuals may be able to verify information relevant to the applicant’s eligibility for naturalization.
USCIS also indicates that applicants may submit this type of evidence with the N-400 itself. Depending on the circumstances, sufficient supporting evidence may help USCIS determine that a separate neighborhood investigation is unnecessary and may potentially reduce the need for a Request for Evidence.
That does not mean every applicant should automatically start collecting letters from neighbors.
Whether additional evidence is useful depends on the circumstances of the individual case.
Becoming a U.S. citizen involves more than living in the country for the required number of years and passing the citizenship test.
Naturalization applicants generally must also demonstrate Good Moral Character (GMC) during the applicable statutory period and through the time they take the Oath of Allegiance.
USCIS may consider numerous circumstances when evaluating good moral character.
Depending on the facts, potential issues may involve certain criminal offenses, false statements to immigration authorities, tax-related matters, unlawful voting, false claims to U.S. citizenship, and other conduct addressed by U.S. immigration law.
The return of neighborhood investigations therefore reinforces something that has always been important:
Information provided on Form N-400 should be complete, accurate, and consistent with the applicant’s actual history and previous immigration records.
The change is particularly relevant locally because thousands of naturalization applications are handled through the San Diego area.
San Diego County is home to a large immigrant and lawful permanent resident population, and naturalization cases are regularly processed through the local USCIS field office.
The new policy may therefore affect applicants living throughout the region, including San Diego, Chula Vista, National City, La Jolla, Carmel Valley, Rancho Bernardo, Poway, El Cajon, Escondido, Oceanside, Carlsbad, Coronado, and surrounding communities.
However, living in San Diego — or in any particular neighborhood — is not itself a reason for an additional investigation.
The policy applies nationwide.
The basic naturalization process remains largely familiar.
An applicant files Form N-400. USCIS conducts required security and background checks and may schedule biometrics when necessary. Most applicants are then scheduled for a naturalization interview.
During the interview, a USCIS officer reviews the N-400 and asks questions about the applicant’s background and eligibility. Unless an exception applies, the applicant must also satisfy the English-language and civics requirements.
The restored neighborhood investigation authority is an additional verification tool. It does not replace the standard naturalization process.
This date is particularly important.
The USCIS policy became effective on August 25, 2026.
According to the agency, it applies to:
Form N-400 applications that were already pending on August 25, 2026, as well as applications filed on or after that date.
In other words, someone who filed an N-400 several months ago but has not yet completed the naturalization process should not assume that the new policy is irrelevant simply because the application was submitted before August 25.
If the N-400 remained pending when the policy became effective, the new guidance may apply.
For most applicants, there is no reason to panic or begin sending unsolicited documents to USCIS.
Instead, this is a good time to review your application carefully.
Pay particular attention to:
Your address history.
Make sure your residential history is accurate and USCIS has your current address.
Your employment history.
Review the employers and dates listed on your application.
International travel.
Confirm the dates and duration of trips outside the United States.
Taxes.
If there are unresolved tax issues, understand how they may affect your naturalization application.
Arrests, citations, or other legal matters.
Do not assume that an old incident is automatically irrelevant to your N-400.
Previous immigration applications.
Information in your current N-400 should not contain unexplained inconsistencies with information previously provided to USCIS or other U.S. government agencies.
If USCIS sends a Request for Evidence (RFE), read the request carefully and respond within the required deadline.
The new USCIS guidance makes this particularly important.
If the agency requests evidence related to residence, employment, good moral character, or another eligibility requirement, failing to provide the requested information may make it more difficult for USCIS to determine that the applicant qualifies for naturalization.
Depending on the circumstances, USCIS may also determine that additional investigation is appropriate.
Receiving a request for additional evidence does not automatically mean an N-400 will be denied.
But it should not be ignored.
Applicants with questions about what USCIS is requesting — particularly when the request involves previous immigration history, criminal issues, taxes, residence, or good moral character — may want to obtain legal advice before responding.
For an applicant with a straightforward immigration history, an accurately completed N-400, and no significant inconsistencies in the record, the new policy does not automatically create a problem.
It does, however, signal a change in the way USCIS may verify naturalization eligibility.
Applicants in 2026 should be particularly careful about the accuracy and consistency of the information they provide to the federal government.
Additional preparation may be especially important when an applicant has a history involving:
These issues are generally better evaluated before the naturalization interview rather than raised for the first time when sitting across from a USCIS officer.
USCIS has officially restored the ability to make greater use of neighborhood investigations when reviewing applications for U.S. citizenship.
But the August 25, 2026 policy does not create automatic home or workplace investigations for every N-400 applicant.
USCIS will make these determinations individually.
For San Diego residents who are currently going through the naturalization process, the practical takeaway is straightforward: review your N-400 carefully, keep your records organized, respond promptly to USCIS requests, and be prepared to verify the information contained in your application.
U.S. citizenship remains attainable for lawful permanent residents who meet the statutory requirements. But under the new policy, careful preparation for the naturalization process may be more important than ever.
If you are preparing to file Form N-400 or have concerns about a pending naturalization application in San Diego or Southern California, consider having your immigration history reviewed before your USCIS interview.
This article is provided for general informational purposes only and does not constitute legal advice. Immigration laws, policies, and procedures may change, and every case depends on its individual facts.
