Dear Ms. Curlis,
Thank you for posting your request on History Hub!
We suggest that you submit a Name Index Search to the US Customs and Immigration Service (USCIS) to obtain a copy of your mother’s naturalization files in their custody. When you submit an Index Search Request, the USCIS Genealogy Program will send you a letter reporting the search results. The letter will identify all file references found in the index and provide instructions and additional information necessary to request the file(s) from the USCIS Genealogy Program or the Freedom of Information (FOIA) Program.
We hope this is helpful. Best of luck with your family research!
If you can give us her name, approximate birth year, and where she lived in the US, we might be able to help you find her naturalization papers.