If you filed an application at a Lockbox facility over 10 days ago and have not received a receipt notice, or do not understand why the Lockbox facility rejected your application, you may email us at Lockboxsupport@uscis.dhs.gov Include the form number, receipt number, applicant name and mailing address. Do NOT include A-numbers or social security numbers in emails.
USCIS Service Centers
If you contacted the National Customer Service Center with a case-related inquiry and more than 30 days have passed and you have not received a response, you may email the appropriate USCIS Service Center with your inquiry:
If you do not receive a response within 21 days of contacting the Service Center, you may contact the USCIS Headquarters Office of Service Center Operations by email at SCOPSSCATA@dhs.gov.
For questions about adoptions from Hague Convention countries, please call 1-877-424-8374 or send an e-mail to NBC.Hague@dhs.gov.
For questions about non-Hague adoption cases, please e-mail: NBC.Adoptions@dhs.gov.
USCIS Historical Reference Library
The USCIS Historical Reference Library is located at:
111 Massachusetts Avenue NW
The Library is open to non-USCIS researchers by appointment only. For a research appointment or other assistance, please email CISHistory.Library@dhs.gov.
Do not send information about specific cases to this address. We only accept website-related comments.
Although we will read every email message within two business days, due to the number of messages, we may not respond to each message we receive.
Last Reviewed/Updated: 09/12/2012
Before I File
After I File