If You Sent Your Form to the Wrong Filing Location
If you mailed your form to an incorrect Lockbox facility, your submission may be forwarded to the correct processing facility. However, if your form is not processed by a Lockbox facility, your package will be returned to the address provided on your forms.
If you believe your package has been lost, please contact your carrier service. If you have questions regarding your submission after 30 business days of processing, you may contact Lockbox Support at
lockboxsupport@uscis.dhs.gov for review of your submission.