USCIS Lockbox Facility USCIS, P.O. Box 21251, Phoenix, AZ 85036. Courier and Express Mail Deliveries, Attn: N400, 1820 E Skyharbor Circle S Floor 1, Phoenix, AZ 85034.
3 Years of Continuous Residence. The spouse of a U.S. citizen residing in the United States must have continuously resided in the United States as an LPR for at least 3 years immediately preceding the date of the filing the application and up to the time of the Oath of Allegiance.
In general, filing your N-400 application online tends to result in faster processing times compared to filing by paper. USCIS typically processes online applications more efficiently because they are submitted electronically, allowing for quicker data entry and processing.
You generally have 2 options for filing your Form N-400 with USCIS: Online; or. By mail (paper).
The first three letters of your receipt number will tell you the exact service center that takes care of your application. Other than that, you can simply check out the list of application/petition types and the offices that process them, as well as which centers have jurisdiction over your state.
You can submit Form N-400 either online through the U.S. Citizenship and Immigration Services (USCIS) website or by mail to a USCIS service center or lockbox.
Living in marital union with the citizen spouse for at least 3 years at the time of filing the naturalization application; and. Applicant's spouse has U.S. citizenship from the time of filing until the time the applicant takes the Oath of Allegiance.
Form N-600 is not intended for applicants who are already green card holders and are planning to naturalize. Instead, they should file Form N-400 (officially called the “Application for Naturalization).