Form N-400, Application for Naturalization, is a form issued by the U.S. Citizenship and Immigration Services (USCIS). The form was last released on September 17, 2019: a fillable PDF version of the USCIS Naturalization Form is available for download through the link below or find it on the USCIS website.
Form N-400 is used to apply for U.S. citizenship by means of the naturalization process. U.S. permanent residents meeting the eligibility requirements can file this form to request citizenship.
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