Proof of Citizenship

Last updated April 29th, 2026

Proof of citizenship refers to documents that establish someone as a US citizen. These types of documents may be required when obtaining your first US passport, or other federally-issued ID.

A birth certificate is usually enough to serve as proof of citizenship. Beyond this, however, a US passport is generally the “main”, universally accepted proof, particularly for anybody not born in the US.

Apply for a Birth Certificate

Anyone wishing to apply for a passport must submit certain documents — usually either a birth certificate or naturalization paperwork.

When renewing a passport, the old one (expired or unexpired) will suffice as evidence of your eligibility. However, expired passports cannot prove citizenship alone.

Anyone born abroad to a US citizen may also claim citizenship using a Consular Report of Birth Abroad (CRBA).

Proof of Citizenship Documents

There are certain types documents available to US citizens that help prove their citizenship:

Primary evidence (always accepted):

* Valid unexpired US passport
* Form N-550, Certificate of Naturalization
* Form N-560, Certificate of Citizenship
* Form FS-240, Report of Birth Abroad of United States Citizen (CRBA) 

Primary evidence (first-time passport applicants):

* Birth certificate showing birth in the US

Anyone born overseas to a US citizen but without any of the above documents (particularly the CRBA) can apply for a passport. For more information, visit the State Department website.

If you are already in the US, you can instead apply to the USCIS via Form N-600 (Application for Certificate of Citizenship). However, it’s best to apply for a passport as this is usually faster than the USCIS route and can be used for travel.

If you have a Certificate of Citizenship or Naturalization and require a replacement, submit Form N-565 (Application for Replacement Naturalization/Citizenship Document).

<< Prev Next >>

Written By:

Expert

We are a team of specialized writers and expert vital records consultants. Our experience in vital records application processes allow us to offer first-rate guidance and advice on…