Was a Certificate of Naturalization issued to him?
Certificates of Citizenship may be requeseted by individuals who were born abroad but are U.S. citizens at birth through their parents, or who became citizens after birth but before the age of 18. A parent or guardian may also request a Certificate of Citizenship on behalf of a minor child.
Certificates of Citizenship are not issued for persons who became a U.S. citizen based on birth in the United States.
A person born abroad who acquires U.S. citizenship at birth is not required to file an Application for Certificate of Citizenship.
An application for Certificate of Citizenship is NOT a request to become a U.S. citizen, it is ONLY a request to obtain a Certificate of Citizenship which recognizes that you became a citizen on a particular date.
An application for Certificate of Citizenship can be made at any time.
8 C.F.R. § 341.1; 341(a); 301;