Certificate of Naturalization: What It Is and What to Do With It

The Certificate of Naturalization is the single most important document you receive when you become a US citizen. It is the legal proof that you completed the naturalization process — signed by a USCIS official, dated on the day of your oath ceremony, and bearing your photograph and unique certificate number. You only get one, and replacing it costs $555 and takes months. Handle it accordingly.

Here is what the certificate contains, what you use it for, and how to protect it.

What the Certificate of Naturalization Contains

Every Certificate of Naturalization includes:

• Your full legal name (including any court-ordered name change you requested during naturalization)
• Your date of birth and country of birth
• Your USCIS Alien Registration Number (A-Number)
• The date of your oath ceremony and the name of the administering court or USCIS field office
• Your photograph at the time of naturalization
• A unique certificate number
• The signature of a USCIS official
• An embossed seal

The document is printed on security paper with anti-counterfeit features — similar in that regard to a US passport biographical page. Do not laminate it. Lamination voids the security features and renders the certificate unacceptable for most official purposes.

When You Receive Your Certificate

If you attend an administrative ceremony (run by USCIS), you typically receive your Certificate of Naturalization the same day as your oath. If the ceremony is conducted by a federal district court, the court may issue the certificate on-site or mail it within a few weeks.

For applicants who changed their name during naturalization, the certificate reflects the new name. The underlying court order for the name change is also issued simultaneously and should be kept alongside the certificate.

What the Certificate Is Used For

Applying for a US Passport: You present your Certificate of Naturalization as evidence of US citizenship. Passport applications for naturalized citizens require the original certificate — not a copy. After the passport is issued, the certificate is returned to you separately, typically by mail, within a few weeks of passport delivery.

Social Security Administration: Wait at least 10 days after your oath ceremony before visiting the SSA. The agency needs time for the citizenship record to update in federal databases. When you visit, bring your certificate and request that your Social Security record be updated to reflect your new citizen status. This affects benefit calculations and, if applicable, the ability to sponsor family members in the immediate relative category.

Voter Registration: Most oath ceremonies offer voter registration on-site. You are now eligible to vote in federal, state, and local elections. If you miss the on-site registration, you can register online or at your local election office using your certificate as proof of citizenship.

Employment Verification: Employers who require proof of work authorization can accept the Certificate of Naturalization for I-9 verification. It is a List A document, meaning it satisfies both identity and employment authorization requirements on its own.

Family Sponsorship Petitions: When you file an I-130 to sponsor a relative (spouse, parent, child, sibling), you submit a copy of your Certificate of Naturalization as proof of your own US citizenship. Always use a certified copy or clear photocopy — the original is not submitted with the petition.

Passport Renewal: After your initial US passport is issued, you no longer need to present your certificate for future renewals. The passport itself is sufficient proof of citizenship.

Derivative Citizenship for Children: Under the Child Citizenship Act of 2000, children born abroad who are lawful permanent residents automatically become US citizens when their parent naturalizes — provided the child is under 18, is an LPR, and is in the citizen parent's legal and physical custody. Parents should file Form N-600 (Application for Certificate of Citizenship) to obtain documentary proof of the child's status. The parent's Certificate of Naturalization is required to file the N-600.

How to Replace a Lost or Damaged Certificate

If your Certificate of Naturalization is lost, stolen, mutilated, or destroyed, you can apply for a replacement by filing Form N-565 (Application for Replacement Naturalization/Citizenship Document). As of 2026, the filing fee is $555.

Processing times for N-565 run 6 to 12 months, though expedited processing is available in limited circumstances (e.g., passport applications for urgent travel that cannot proceed without the certificate). You will need to submit evidence of your original naturalization — any documentation you have from the original process, such as the receipt notice or photos from the ceremony.

To minimize the risk of needing a replacement:

• Make multiple certified copies immediately after receiving your certificate. A local notary or USCIS-affiliated organization can certify photocopies.
• Store the original in a secure location — a fireproof safe or safety deposit box at a bank.
• Photograph or scan the document and store the digital copy in a secure cloud location separate from any physical copies.

The Certificate vs. a US Passport as Proof of Citizenship

Both documents prove US citizenship, but they serve different functions. The Certificate of Naturalization is the foundational proof — it is what you use to obtain a passport, and it predates the passport in your citizenship timeline. The US passport is more practical for day-to-day use as a photo ID and for international travel, but it does not substitute for the certificate in certain legal or bureaucratic contexts (such as filing a derivative citizenship application for a child).

Once you have a valid US passport, you rarely need to show your certificate again. But "rarely" is not "never" — keep it stored safely and accessible.

What Happens if Your Name Changes After Naturalization

If you change your name after naturalization (through marriage, divorce, or a separate court proceeding), your Certificate of Naturalization reflects your name at the time of the ceremony. To update it, you file Form N-565 and pay the $555 replacement fee. Alternatively, for most practical purposes, presenting your certificate alongside your marriage certificate or court name change order is sufficient — you do not need to replace the certificate itself.

The certificate is the finishing line of a process that starts months or years before, with the N-400 filing, the civics test, and the interview. If you are still preparing for that process, the US Naturalization (N-400) Citizenship Guide walks through each stage in detail — from calculating your eligibility dates to what happens at the oath ceremony.