[Q : What is the Lockbox?]
The NBC receives Forms submitted by applicants from the Lockbox. In general, a
lockbox is a post office box used by organizations to accelerate the collection
of receivables. In the case of the NBC, the Lockbox is used to accelerate these
receivables (which are applications and petitions) by electronically capturing
data and images from these Forms and by performing fee receipting and fee
deposit. USCIS employees oversee Lockbox operations and perform case resolution
activities on cases processed at the Lockbox. Cases are reviewed at the Lockbox
for basic information only, including the completion of the following items:
Basic biographical information
Signature on the Form
Jurisdiction of the submitted Form
Basic Eligibility (including visa availability) of applicant
The Chicago Lockbox (also known as USCIS Lockbox) is a filing address for certain USCIS applications.
Please check the form download page at uscis.gov for the current correct address. Note that addresses will be different for Post Office delivery vs private courier delivery (FedEx, UPS, DHL etc).