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Dear Mr. Kurek,
Thank you for posting your request on History Hub!
An important point of differentiation - is it a Certificate of Citizenship or a Certificate of Naturalization? Certificate of Citizenship indicates that the individual was deriving citizenship from a parent, while Certificate of Naturalization indicates the individual was applying independently to obtain citizenship.
If it is a Certificate of Citizenship, there wasn’t the standard naturalization paperwork (declaration, petition, etc) involved in the process - it truly was just an application that was submitted. Unfortunately, in this time frame of Immigration and Naturalization Service (INS) record-keeping, it is unlikely that you will be able to track down a copy of the application. It is possible that a Certificate File (C-File) or other INS file could exist, but it is unlikely. Your best paperwork option is going to be the documentation for the parent the individual was deriving citizenship from as this would have been that individual’s proof of eligibility to obtain their certificate.
If you want to know definitively what INS created/maintained on the individual, you will need to submit an Index Search request through the US Citizenship and Immigration Services (USCIS) Genealogy Program (www.uscis.gov/genealogy).
We hope this is helpful. Best of luck with your family research!
[Information provided by Elizabeth Burnes, Subject Matter Expert]