Direct Filing N-400 Application for Naturalization

The Direct Mail Program for Form N-400, Application for Naturalization, took effect on January 22, 2009. As of that date, all nonmilitary applicants must submit Form N-400, and any related supplements, to one of two lockbox addresses, based on where the applicant resides. N-400s will be processed by the National Benefits Center, which will complete national security checks, conduct various processing steps, and maintain applicant files waiting for adjudicative interview by USCIS field offices. Previously these tasks were performed by the USCIS service centers.

Applicants who reside in: Alaska, Arizona, California, Colorado, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming, Territory of Guam, or the Northern Mariana Islands must submit Form N-400 to:

U.S. Postal Service Address:
USCIS Lockbox Facility, USCIS
P.O. Box 21251
Phoenix, AZ 85036

Private Courier (non-USPS) Address:
USCIS, Attn: N400
1820 E Skyharbor Circle
S. Floor 1, Phoenix, AZ 85036

Applicants who reside in: Alabama, Arkansas, Connecticut, Delaware, DC, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, or the U.S. Virgin Islands must submit Form N-400 to:

U.S. Postal Service Address:
USCIS Lockbox Facility, USCIS
P.O. Box 299026
Lewisville, TX 75029

Private Courier (non-USPS) Address:
USCIS, Attn: N400
2501 S. State Hwy 121, Bldg. 4
Lewisville, TX 75067.

USCIS will only forward incorrectly filed N-400s to the correct location for 30 days after the effective date of the change. After this 30-day period, the agency will reject cases that are not filed according to the new policy.