| Agency | Address | Phone / Fax Numbers | Instructions |
| AAO | DHS, CIS, AAO 20 Massachusetts Ave, NW, Room 3000 Washington, DC 20529 | Phone: 202.272.1212 Fax: 202.272.1262 | |
| CBP Field Operations Offices Deferred Inspection Sites | deferred_inspection_sites.pdf | deferred_inspection_sites | |
| CBP Preclearance Locations Ports of Entry | http://www.cbp.gov/xp/cgov/toolbox/contacts/preclear_locations.xml | http://www.cbp.gov/xp/cgov/toolbox/contacts/preclear_locations.xml | |
| CSC Case Status Inquiries | ciscasestatusinquires.pdf | ciscasestatusinquires.pdf | |
| CSC Attorney Change of Address | CSC PO Box 30111 Laguna Niguel, CA 92607 | To report the attorney change of address, you may call the National Customer Service Center at 1-800-375-5283 | To report the attorney change of address, you may call the National Customer Service Center or send an E-mail to the CSC at the appropriate e-mail address, as listed below: CSC-XII.131@dhs.gov CSC-XII.140@dhs.gov CSC-XII.360@dhs.gov CSC-XII.485@dhs.gov CSC-XII.817@dhs.gov CSC-XII.400@dhs.gov CSC-XII.129@dhs.gov CSC-XII.539@dhs.gov CSCXII.765@dhs.gov CSC-XII.130@dhs.gov CSC-XII.751@dhs.gov CSC-XII.90@dhs.gov CSC-XII.129F@dhs.gov |
| CSC Case Status Inquiries | ciscasestatusinquires.pdf | Phone: 1.800.375.5283 csc-ncsc-followup@dhs.gov | Procedure/Call NCSC. If there is no e-mail response after 30 days, contact via email. |
| CSC Expedite Procedures | 1.800.375.5283 | ||
| CSC Improper Rejection | USCIS California Service Center ATTN: CRU 24000 Avila Road, 2ndFloor Laguna Niguel, CA 92677 | cscimproperrejection.doc | Attach a brightly colored sheet on the front , send original filing, rejection notice, reason rejection incorrect, original check, out in 2 envelopes with the inner envelope stating , “DO NOT OPEN IN THE MAILROOM” . |
| CSC Premium Processing | Mailing: USCIS – CSC Premium Processing PO Box 10825 Laguna Niguel, CA 92607-0825 |