Certificate of Naturalization Law and Legal Definition

The Certificate of U.S. Naturalization (form N-550 or N-570) is a document issued by the United States government as proof of a person having obtained U.S. citizenship through naturalization, that is the legal process of obtaining a new nationality. Since October 1, 1991, the Certificate of U.S. Naturalization has been issued by the USCIS. On or before September 30, 1991 it was issued by the Federal Courts and particular State Courts. The United States Certificate of Naturalization is proof of an individual’s U.S. citizenship through naturalization.