The Certificate of U.S. Naturalization (form N-550 or N-570) is a document
issued by United States government as proof of a person having obtained U.S.
citizenship through naturalization (a legal process of obtaining a new
nationality). The Certificate of U.S. Naturalization has been issued since
October 1, 1991 by the USCIS, and on or before September 30, 1991 by Federal
Courts and particular State Courts. The United States Certificate of
Naturalization is proof of an individual’s U.S. citizenship through
The Certificate of United States Naturalization Guide was developed to help
naturalized U.S. citizens complete and file their own requests for a copy of
their Certificate of United States Naturalization. The "How to obtain a copy of
your Certificate of United States Naturalization" is a step-by-step-guide that
will help you file your request as efficiently and quickly as possible. You
should only apply for a replacement certificate if your current certificate of
naturalization is incorrect, lost, mutilated, or destroyed.
Who issues the Certificate of United States Naturalization?
The Certificate of Citizenship is a document that is issued by the U.S.
Citizenship and Immigration Service (USCIS).
Important: Only naturalized United States citizens can apply for a
Certificate of U.S. Naturalization. If you are not a United States citizen, you
for U.S. citizenship.