Your naturalization certificate number is printed on the front of your certificate, usually in the upper right corner or along the top edge

The naturalization certificate number is a unique identifier assigned by U.S. Citizenship and Immigration Services (USCIS) when you became a U.S. citizen through naturalization. It appears as a series of numbers on the physical certificate itself — typically eight digits, though the format can vary depending on when the certificate was issued. You do not need to contact anyone to "find" it; the number is already on the document you received after your oath ceremony.

If you have your certificate in hand, look at the front side. The number is usually printed in one of two places: in the upper right corner of the certificate, or along the top edge near your name. The certificate is a formal document about the size of a standard letter, with an official seal and your photograph.

Key Takeaways

  • Your naturalization certificate number is printed directly on the front of your certificate, typically in the upper right corner or top edge.
  • The number is eight digits in most cases, though older certificates may use a different format.
  • If you cannot locate your physical certificate, USCIS can issue a replacement or provide the number through a records request.
  • You will need your full name, date of birth, and the approximate year you naturalized to request this information from USCIS.
  • Some employers and government agencies accept a copy of your certificate as proof of citizenship instead of requiring the number alone.

What the certificate number looks like

The naturalization certificate number is always numeric — no letters. It typically runs eight digits long for certificates issued in recent decades. Older certificates, issued before the 1990s, may use a different numbering system or format, so if your certificate is from the 1970s or 1980s, the number may look slightly different from what you see on newer documents.

The number is printed in black ink on the front of the certificate. It is separate from your A-number (also called your USCIS number or alien number), which is a different identifier used during your immigration case. Do not confuse the two — the naturalization certificate number is the one printed on the certificate itself.

Where exactly to look on your certificate

Open your certificate and look at the front side. Start with the upper right corner — this is the most common location. If you do not see it there, scan along the top edge of the certificate, just below or above your name. Some certificates print the number in the upper left corner instead.

The number will be in a clear, readable font and will stand out from the decorative elements of the certificate. It is not hidden or printed in small text. If you are having trouble spotting it, make sure you are looking at the front of the certificate and not the back, which typically contains only text about the certificate's validity.

If you have lost or damaged your certificate

If your certificate is lost, stolen, or too damaged to read the number, USCIS can issue a replacement certificate. You will need to submit Form N-565, process for Replacement Permanent Resident Card, along with supporting documents and a fee. The form is available on the USCIS website at uscis.gov.

When you request a replacement, USCIS will assign a new certificate number to the replacement document. You can also request a copy of your naturalization records from USCIS without ordering a replacement certificate — this route is faster if you only need the number for a specific purpose, such as filling out a form or verifying your citizenship status.

How to request your number from USCIS if you cannot find it

Contact USCIS directly through their online account portal at uscis.gov, or call the USCIS National Customer Service Center at 1-800-375-5283. Have ready your full name, date of birth, and the approximate year you naturalized. USCIS staff can look up your records and provide the number over the phone or by mail.

You can also visit a local USCIS field office in person. Bring a government-issued photo ID and any documents related to your naturalization case. Field office locations and hours are listed on the USCIS website. Processing times vary, but phone inquiries are usually answered within a few minutes during business hours.

When you need the certificate number

Some government forms and employment verification processes ask for your naturalization certificate number specifically. Banks, employers, and government agencies may request it as part of identity verification or citizenship confirmation. In most cases, however, you can submit a photocopy of your entire certificate instead of providing just the number — this is often simpler and provides more complete proof of your status.

If a form requires the number and you do not have it memorized, contact the organization requesting it and ask whether they will accept a copy of the certificate itself. Many will, which saves you the step of tracking down the number separately.

Keeping your certificate safe and accessible

Store your original naturalization certificate in a safe place — a home safe, safe deposit box, or fireproof document storage container. Make at least two photocopies and keep them in separate locations. Write the certificate number on a document you keep in your regular files, so you can reference it without handling the original certificate repeatedly.

If you travel internationally, carry a photocopy of your certificate, not the original. The original should stay at home. Many countries accept a certified copy of your naturalization certificate as proof of U.S. citizenship when explore for visas or other documents.

Frequently Asked Questions

Is the naturalization certificate number the same as my Social Security number or A-number?

No. Your naturalization certificate number is unique to that document. Your A-number (USCIS number) is a separate identifier used during your immigration case. Your Social Security number is a third identifier issued by the Social Security Administration. They are three different numbers.

Can I use a photocopy of my certificate instead of providing the number?

Yes, in most situations. Many employers, banks, and government agencies accept a photocopy of your naturalization certificate as proof of citizenship. Check with the organization requesting the information — they may not need the number at all if you can provide the certificate itself.

What if my certificate is from another country and I naturalized in the United States?

If you naturalized in the U.S., your certificate was issued by USCIS and will have a U.S. naturalization certificate number. If you are thinking of a citizenship certificate from another country, that is a different document entirely and would not have a USCIS number.

How long does it take USCIS to send me my certificate number if I request it?

If you call USCIS, they can provide the number when ready during your call. If you submit a written request by mail, processing typically takes two to four weeks. Using the online USCIS account portal is usually faster than mailing a request.

Do I need my certificate number to renew my passport?

No. When you explore for a U.S. passport, you can submit your naturalization certificate itself as proof of citizenship. The State Department does not require the certificate number — they accept the physical document or a certified copy.