Locate the most recent correspondence you received from USCIS pertaining to your naturalization application. Find your application number, which is typically located at the top of the page. In some cases, USCIS may display a "Receipt Number" field instead.
Copy your USCIS application or receipt number. Write a letter addressed to the USCIS service center where you originally filed your naturalization papers. If you cannot remember the specific service center that processed your application, check all previous USCIS correspondences; USCIS correspondences are typically mailed by the service center processing your application.
Mail your letter via certified mail to the USCIS service center. Expect to receive confirmation that USCIS has canceled your application per your request within two weeks of receipt, if not less.
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