Citizenship Application Form N400 is used for obtaining US Citizenship (naturalization).
A completed error-free form N400 should be filed with the United States Citizenship and Immigration Services (USCIS) along with photos and supporting documents as outlined in the Citizenship Application filing instructions.
Applying for U.S. Citizenship
Becoming a U.S. citizen has many advantages including the right to vote and the ability to sponsor relatives to come to the United States. The Citizenship Application (Form N-400) is completed by Lawful Permanent Residents (Green Card holders) over age 18 who meet the eligibility requirements to apply for US citizenship.
N-400 Eligibility Requirements
In order to apply for U.S. citizenship, you must meet the following requirements:
- Be at least 18 years old
- Have had a valid Green Card at least five years. If you are married to U.S. citizen you may apply after three years with a valid Green Card. Or, if you have served in the United States armed forces during war, you may apply for U.S. citizenship without first obtaining a Green Card if you were in the United States upon enlistment into the U.S. military.
- Have maintained continuous residence in the United States for at least five years (or three years if you are married to a U.S. citizen)
- Have been physically present in the United States for at least two and a half years (or one and half years if you are married to a U.S. citizen)
- Have lived in the state where the Form N-400 is submitted for at least three months
- Be able to read, write and speak English
- Have a general knowledge of the fundamentals of U.S. history and government
Be a person of good moral character and willing to abide by the principles of the U.S. Constitution.