Apply Online:
Apply by Mail
U.S. Citizenship and Immigration Services
USCIS Elgin Lockbox
U.S. Postal Service (USPS):
USCIS
Attn: NATZ
P.O. Box 4088
Carol Stream, IL 60197-4088
FedEx, UPS, and DHL deliveries:
USCIS
Attn: NATZ (Box 4088)
2500 Westfield Drive
Elgin, IL 60124-7836
Contact Details link
Regional office link
Please attach sample completed documents that would help other people.
Videos explaining the procedure or to fill the applications. Attach videos using the following tag <&video type='website'>video ID|width|height<&/video&> from external websites. Please remove the '&' inside the tags during implementation. Website = allocine, blip, dailymotion, facebook, gametrailers, googlevideo, html5, metacafe, myspace, revver, sevenload, viddler, vimeo, youku, youtube width = 560, height = 340, Video ID = Can be obtained from the URL of webpage where the video is displayed. e.g In the following url 'http://www.youtube.com/watch?v=Y0US7oR_t3M' Video ID is 'Y0US7oR_t3M'.
Please explain what are other uses of obtaining this document/certificate. e.g. Birth Certificate can be used as proof of identity.
Benefits of Citizenship