I lost my naturalization certificate how do i get a copy?

To obtain a replacement for your lost naturalization certificate, you need to file Form N-565, Application for Replacement Naturalization/Citizenship Document, with the U.S. Citizenship and Immigration Services (USCIS). You can submit the form online or by mailing a paper application. There is a fee for the application, and you'll need to provide proof of your identity. Once processed, USCIS will send you a replacement certificate.