Check your Form N-400 for errors before you file

The application to become a U.S. citizen through naturalization. A single blank field or wrong-edition page gets the whole package returned, and since 07/10/2026 an invalid signature can be denied outright — and the $760 paper filing fee is generally non-refundable. Here is exactly what to verify on your completed N-400 before it goes to USCIS.

How do I check my N-400 for errors?

1. Confirm you have the current edition

USCIS accepts only the current edition of N-400 — filing a superseded version is an automatic rejection. The current edition is dated 01/20/25; the date is printed at the bottom of every page. All pages must come from the same edition. Download a fresh copy from uscis.gov right before you file.

2. Verify every signature block

Unsigned or wrongly-signed forms are rejected — or, under the signature rule effective July 10, 2026, denied outright with the filing fee kept and no chance to fix it. A typed name, a cursive or script font, a stamp, or a digital e-signature (such as DocuSign) is not a valid signature on a paper filing; only a handwritten ink signature — or a scan, photocopy, or fax of one — is accepted. An electronic signature counts only when it is captured through a USCIS online account during online filing. N-400 has 6 signature blocks to check:

3. Make sure no required section is incomplete

Leaving required fields blank (instead of writing “N/A” or “None”) is one of USCIS's most common rejection reasons. On N-400, pay special attention to:

• Part 1, Items 1.A-1.G: Eligibility basis — select EXACTLY ONE box
• Part 2, Items 1-7: Legal name, other names used, A-Number, USCIS Online Account Number (if any)
• Part 2, Items 6: Date of Birth (mm/dd/yyyy)
• Part 2, Items 7: Date you became a lawful permanent resident (mm/dd/yyyy, as on green card)
• Part 3, Items all: Biographic information
• Part 4, Items 1-3: Physical address history and a current, complete, valid mailing address
• Part 5, Items all: Marital history (current and prior marriages, spouse details)
• Part 6, Items all: Children

4. Check every date — format and consistency

Dates must be written mm/dd/yyyy — 8 digits (e.g., 05/01/2019) and must agree with your supporting documents and any other forms in the package. The date fields that most often cause problems on N-400:

• Part 2 Item 6 — Date of Birth — Missing DOB = automatic rejection.
• Part 2 Item 7 — LPR date — Must match the green card; missing = possible rejection.
• Part 8 — trip departure/return dates — Gaps, overlaps, or trips that break continuous residence are the top N-400 substantive problem.
• Part 8 — total days outside the U.S. vs the sum of the listed trips (day-count conventions legitimately differ by a day per trip — flag only a stated total that differs from the summed trips by more than a few days) — Explicitly add up the days outside the U.S. across every trip listed in Part 8 (return date minus departure date for each) and compare that sum to any stated total days outside / physical-presence figure. A stated total that does not match the summed trip days is an inconsistency — flag it (code INCONSISTENT_ANSWER).
• Filing date itself — Filing more than 90 days before completing the continuous-residence period = rejection (use the USCIS Early Filing Calculator).

5. Re-check the known N-400 filing problems

From USCIS's own instructions and guidance, these are the specific problems to rule out on N-400. Some get a filing rejected at intake; others surface later as a Request for Evidence or a denial:

• Application not signed, or invalid signature (a typed, script-font, stamped, or digital/e-signature is invalid where an ink signature is required; as of 07/10/2026 this is a denial with the fee kept, not merely a rejection)
• Wrong fee amount, wrong payment method, or overpayment — all cause rejection
• Filing too early — more than 90 days before meeting continuous residence
• Date of birth missing (will reject); LPR date missing (may reject)
• Missing pages — all pages must be included even if blank — or application not executed in its entirety
• No current, complete, valid mailing address
• Part 1 eligibility: no box, or more than one box, selected
• Correction tape/fluid or writing outside response areas — scanners misread, causing delays or rejection

Related

Form N-400 error check — frequently asked questions

How do I check my Form N-400 for errors before filing?

Work through the checklist on this page: confirm you have the current 01/20/25 edition, verify every signature block is signed and dated by the right person, make sure no required field is blank (write "N/A" or "None" instead), check every date is in mm/dd/yyyy format and consistent across your documents, and re-read the known problems below. Or upload your completed N-400 to FormGuard and get an automated line-by-line error report in about a minute for $39.

What problems most often hold up a Form N-400 filing?

Application not signed, or invalid signature (a typed, script-font, stamped, or digital/e-signature is invalid where an ink signature is required; as of 07/10/2026 this is a denial with the fee kept, not merely a rejection); Wrong fee amount, wrong payment method, or overpayment — all cause rejection; Filing too early — more than 90 days before meeting continuous residence; Date of birth missing (will reject); LPR date missing (may reject); Missing pages — all pages must be included even if blank — or application not executed in its entirety.

Which edition of Form N-400 is current?

The current edition of Form N-400 is dated 01/20/25. USCIS rejects forms filed on a superseded edition, so download a fresh copy from uscis.gov right before you file and confirm the edition date printed at the bottom of every page matches.

What happens if my N-400 is rejected?

USCIS returns the entire package unprocessed and the $760 paper filing fee for N-400 is generally non-refundable — you correct the error, pay again, and lose weeks or months. That is why a careful pre-filing check is the cheapest step in the whole process.