Belated update: After a repeat inquiry to NARA, they found the naturalization record! What a relief. Not sure what happened the first time. Try giving more details to the NARA folks, such as common misspellings of your ancestor's name and possible nicknames used around the time of naturalization ...

Thanks for your response. My problem is that I've already done this research and something still isn't lining up. He lived in Cook County, Illinois (Chicago) at the time of naturalization. According to the county response to my inquiry, all naturalizations after 1929 were performed in the federal ...

Thank you in advance to anyone who can help find this information.

I'm applying for dual citizenship and am having trouble locating naturalization records on one family member.

Born: Costantino Zanfardino
Place of Birth: Afragola, Italy
DOB: 08-11-1953

Residence at time of naturalization: Forest ...