What is the N-400 application form called?

The N-400 application form is officially known as the "Application for Naturalization." This document is specifically used by individuals who are seeking to become U.S. citizens after meeting certain eligibility requirements. It plays a critical role in the naturalization process, as it collects personal information, documentation of residency, and details about the applicant's background, all of which are necessary for the U.S. Citizenship and Immigration Services (USCIS) to evaluate the application.

While options like "Application for Permanent Residency" and "Application for Immigration Benefits" reference other processes within the immigration framework, specifically related to obtaining a green card or other rights, they do not apply to the naturalization process that the N-400 addresses. The term "Application for Citizenship" may seem close, but the official title is the Application for Naturalization, which emphasizes the specific nature of the process: transitioning from a lawful permanent resident to a citizen. Thus, the correct answer highlights the formal title of the document that serves a unique and critical purpose in the pathway to citizenship.