Mail your Form N-600 to the USCIS Phoenix Lockbox facility:
P.O. Box 20100
Phoenix, AZ 85036
For USPS Express Mail/Courier
Attn: Form N-600
1820 E. Skyharbor Circle S, Suite 100
Phoenix, AZ 85034
If you are filing your Form N-600 at one of the USCIS Lockbox facilities, you may elect to receive an email and/or text messages its acceptance. You must complete Form G-1145, E-Notification of Application/Petition Acceptance and attach it to the first page of your Form N-600.
Note on Filing Fee (Exceptions):
There are two exceptions:
To ensure your application is accepted, please ensure that you:
Download:US Naturalization Process
Attorney or representative:
You may be represented, at no expense to the U.S. Government, by an attorney or other duly authorized representative. Your representative must submit Form G-28, Notice of Entry or Appearance as Attorney or Representative, with your Form N-300. Your representative may also submit Form G-28 at the time of your interview.
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