Top 7 Mistakes That Can Derail Your U.S. Citizenship Application

Learn about the most common errors applicants make when applying for U.S. citizenship and how to avoid them.

Applying for U.S. citizenship isn’t just paperwork—it’s the final step in years of effort, patience, and planning. The process is strict, and even small slip-ups can slow things down or lead to outright denial. The good news is that most mistakes are avoidable if you know what to watch out for.

Here are the seven most common errors applicants make, and how to avoid them.

1. Incomplete or Incorrect Forms

This is the number one reason applications get rejected. USCIS is unforgiving about missing details.

How to avoid it:

• Always download the newest version of Form N-400 from the USCIS website

• Answer every question. If something doesn’t apply, write “N/A” or “None”

• Double-check names, dates, and addresses against past applications

• Don’t forget signatures and dates

2. Missing or Wrong Supporting Documents

USCIS won’t just take your word for it—you have to prove every claim.

How to avoid it:

• Use the USCIS checklist for Form N-400

• Include required items like your green card copy, tax records, marriage or divorce certificates, and full travel history

• Translate non-English documents using certified translators

• Keep your packet organized and easy to review

3. Applying Before You’re Eligible

Some applicants rush the process and file too soon. USCIS will deny you if you don’t meet the requirements on the filing date.

How to avoid it:

• Count your years of permanent residence—five years for most, three if married to a U.S. citizen

• Make sure you meet the physical presence requirement and haven’t spent too much time abroad

• Maintain “good moral character” during the required period (tax compliance, no serious criminal issues, etc.)

4. Paying the Wrong Fee

Application fees change. Submitting the wrong amount is an automatic rejection.

How to avoid it:

• Confirm the current fee on the USCIS website the day you file

• Use an accepted payment method (check, money order, or online payment)

• Send the exact amount—no rounding, no errors

5. Poor Interview Preparation

The naturalization interview is where USCIS officers look for clarity, honesty, and consistency.

How to avoid it:

• Arrive early with your appointment letter and documents

• Review your application beforehand—officers will ask you about it directly

• Answer clearly and truthfully, even if a question feels uncomfortable

6. Underestimating the Citizenship Test

The civics and English tests are straightforward, but not if you walk in unprepared.

How to avoid it:

• Study the official 100 civics questions from USCIS

• Practice reading, writing, and speaking in English daily

• Take practice tests to build confidence and track progress

7. Forgetting to Follow Up

Filing isn’t the end of the process. If you ignore follow-ups, your case can stall or be denied.

How to avoid it:

• Create a USCIS online account to track your case

• Respond quickly to any Request for Evidence (RFE)

• Keep copies of every document and letter you send or receive

Final Tip

Rely only on official USCIS information. Keep your records organized and your answers consistent. If your case has complications, professional guidance can save time and prevent costly mistakes.

Need Expert Help

Ready to apply for U.S. citizenship with confidence? Tejas G. Patel, Esq., founder of T.P.L. Global and Boston’s Top Immigration Lawyer, provides sharp legal strategy with genuine care. With a proven track record of guiding individuals and families through complex immigration challenges, Tejas can help you avoid costly mistakes and achieve your American dream.