Thank you for posting your request on History Hub!
In most cases, the National Archives will not have a copy of the certificate of naturalization. Two copies of the certificate were created after September 26, 1906 – one given to the petitioner as proof of citizenship, and one forwarded by the courts to the Immigration and Naturalization Service (INS).
Certificates of naturalization were issued by the federal courts until October 1991 when naturalization became an administrative function under the INS.
INS records are now overseen by the United States Citizenship and Immigration Services (USCIS). USCIS maintains duplicate copies of naturalization records (including certificates) created September 27, 1906–March 31, 1956 within Certificate Files (C-Files). Beginning April 1, 1956, INS began filing all naturalization records in a subject’s Alien File (A-File). C-Files can be requested through the USCIS Genealogy Program.
Do you really need his naturalization documents? Especially the Petition. That's where all the information about his date and place of death is, as well as how he entered the U.S., and the names of his family at the time. The Certificate is more of an honorary piece of paper.
Thankful I am seeing your reply here. I was researching this for my own purposes to obtain dual citizenship, but perhaps what I found on the 1920 + census will be sufficient. Grazie!
