Certificate of Naturalization Apostille: Requirements and Process
A Certificate of Naturalization apostille authenticates your USCIS-issued proof of citizenship for use in a Hague Convention country. Foreign governments, banks, courts, and immigration offices routinely ask naturalized U.S. citizens to prove their citizenship with an authenticated document, and an apostille is the internationally recognized way to do that among the countries party to the Hague Apostille Convention. This guide explains what the certificate is, how to obtain a copy or certified copy from USCIS, where to find your certificate number, and how the federal apostille process works for this specific document.
What is a Certificate of Naturalization?
A Certificate of Naturalization is the official document U.S. Citizenship and Immigration Services (USCIS) issues to a foreign-born person who becomes a United States citizen through the naturalization process. It is designated Form N-550 (or Form N-570 when issued as a replacement), and most people receive it at their naturalization oath ceremony. The certificate serves as primary legal proof of U.S. citizenship for anyone who was not a citizen at birth, and it is accepted when applying for a U.S. passport, updating Social Security records, and proving citizenship to employers or government agencies. Because it is issued by a federal agency, it occupies a different authentication track than state-issued documents like birth certificates — a distinction that matters a great deal when you need to use it abroad.
How to Get a Certified Copy of Your Naturalization Certificate
When a foreign authority asks for a "certified copy" of your naturalization certificate, they generally mean a copy that USCIS itself has verified as true and accurate — not a notarized photocopy. USCIS can issue a certified true copy of a Certificate of Naturalization when you demonstrate that a foreign government or other authority requires the authenticated document, which is exactly the situation an apostille request creates. This route exists because many people understandably do not want to send their one original certificate overseas or submit it into a mail-based process. Note that ordinary photocopying of a naturalization certificate is restricted by law except for lawful purposes, so the correct path is always to go through USCIS rather than reproducing the document yourself. If you plan to apostille the document, confirm with the receiving country whether they will accept an apostilled certified copy or insist on the original, since practice varies by destination.
How to Get a Copy of Your Naturalization Certificate If Yours Is Lost or Damaged
If your original certificate has been lost, stolen, mutilated, or contains an error, you can request a replacement from USCIS by filing Form N-565, Application for Replacement Naturalization/Citizenship Document. The replacement is issued as Form N-570 and carries the same legal force as the original. You will need to provide identifying information, an explanation of what happened to the original, and the applicable USCIS filing fee, and processing can take a number of months, so it is worth starting early if you have an international deadline. A replacement certificate, once issued, can be apostilled through the federal process the same way an original can. If your certificate is intact and you simply need an additional authenticated version for use abroad, the certified true copy route described above is usually the more appropriate request than a full replacement.
Where to Find Your Certificate of Naturalization Number
Every Certificate of Naturalization carries a unique certificate number, sometimes called the naturalization number. On most certificates it is printed in red ink in the upper portion of the document, typically near the top right, and it usually consists of seven to eight digits, sometimes preceded by a letter. This number identifies your specific certificate in USCIS records and is distinct from your Alien Registration Number (A-Number), which also appears on the certificate and identifies you as a person rather than the document. When you request a replacement, a certified copy, or an apostille, having the certificate number on hand helps ensure the record is matched correctly. If you cannot locate the number because the certificate is lost, the Form N-565 replacement process can proceed with your other identifying information.
What Does a Naturalization Certificate Look Like?
A Certificate of Naturalization is a formal, single-page document printed on security paper with a U.S. Department of Homeland Security seal. It displays your full legal name, your photograph, your date of birth, your country of former nationality, the date of naturalization, and the location of the court or USCIS office where the oath was administered, along with your signature. The certificate number appears in red, and older certificates issued over the decades vary somewhat in layout, color, and issuing authority — certificates issued before the creation of USCIS may reference the Immigration and Naturalization Service (INS) or a federal court. All versions, old and new, remain valid proof of citizenship and can be authenticated for international use. Foreign authorities receiving an apostilled certificate will see the apostille certificate attached to or accompanying the document, confirming the authenticity of the U.S. official signature and seal.
Can You Apostille a Certificate of Naturalization?
Yes. Because the Certificate of Naturalization is issued by USCIS — a federal agency — it must be apostilled through the federal route: the U.S. Department of State's Office of Authentications in Washington, DC. A state Secretary of State cannot apostille it, which is a common point of confusion, since most familiar documents like birth and marriage certificates go through state offices. The Department of State verifies the federal signature and seal and attaches the apostille, making the document acceptable in any of the countries party to the Hague Apostille Convention. Filed in person in Washington, DC, processing takes roughly 10 business days; filed by mail, it typically takes 8–12 weeks. Federal Apostille™ handles the federal filing in person on your behalf — we review your document, confirm it is in acceptable form, walk it through the Office of Authentications, and return the apostilled certificate to you, so you avoid the long mail queue and the risk of a rejected submission.
Frequently asked questions
What is the difference between a Certificate of Naturalization and a Certificate of Citizenship?+
Both are USCIS documents proving U.S. citizenship, but they cover different situations. A Certificate of Naturalization (Form N-550/N-570) goes to someone who became a citizen through the naturalization process as an adult. A Certificate of Citizenship (Form N-560/N-561) goes to someone who acquired or derived citizenship through a U.S. citizen parent, often as a child, without going through naturalization themselves. Both are federal documents, and both follow the same federal apostille route through the U.S. Department of State.
Can I just notarize a photocopy of my naturalization certificate and apostille that instead?+
Generally no. Reproducing a naturalization certificate outside of lawful channels is restricted, and foreign authorities requesting an apostille almost always expect the original certificate or a USCIS-issued certified true copy. Check with the receiving country's authority about which form they will accept before you file, so you only go through the process once.
Will the apostille work in any country?+
An apostille is recognized in the countries that are party to the Hague Apostille Convention — more than 120 of them. If your destination country is not a Convention member, the document instead needs authentication followed by legalization at that country's embassy or consulate, a longer multi-step process. Confirm your destination country's status before choosing a route.
Federal Apostille™ is a private, independent courier and document-processing service. We are not affiliated with the U.S. Department of State or any government agency.