If you have a question about a filing mailed to the Chicago, Dallas, Phoenix, or Elgin Lockbox you may email us at lockboxsupport@uscis.dhs and we will answer your email as soon as possible. Please include the form number, receipt number, petitioner and/or applicant name, and mailing address.
Us by email at LockboxSupport@uscis.dhs. We will answer each email in turn as soon as possible. Please include the form number, receipt number, petitioner and/or applicant name, and mailing address with your email.
You should be sure to provide key identifying information including the form number; petitioner and/or applicant name, mailing address, and date of birth; your G-28 info; and proof of delivery (tracking info). You should expect to receive a response from Lockbox support within 5 days.
Important update: December 12, 2024: Wait times for receipt notices processed by a USCIS Lockbox have returned to normal. Cases that don't require additional review are processed within 3 business days, while cases needing extra review take up to 15 days.