What form would an applicant file to appeal an unfavorable naturalization decision?

An applicant seeking to appeal an unfavorable naturalization decision would file Form N-336, which is specifically designed for this purpose. This form is used to request a hearing before an Immigration Officer when the U.S. Citizenship and Immigration Services (USCIS) denies an application for naturalization. The N-336 allows applicants to present their case and provide additional evidence or arguments regarding their eligibility for citizenship, thereby facilitating a more formal review of the decision made by USCIS.

Other forms mentioned serve different purposes: Form N-400 is the application for naturalization itself; Form G-28 is used by an attorney or accredited representative to represent an applicant; and Form EOIR 29 is related to appeals regarding decisions made in removal proceedings. Therefore, Form N-336 is the appropriate and correct form to file for an appeal in this context.