US Green cards are either approved domestically through the I-485, Adjustment of Status process, or approved abroad through the Consular process. When the approval is made at the Consulate, the immigrant must make a final payment of $165 to the USCIS before they will start the production of the green card.
The $165 USCIS Immigrant Visa fee is for the cost of producing the green card. This payment must be made through the USCIS ELIS (Electronic Immigrant System) on-line payment system.
MU Law encourages you to make this payment after you receive the immigrant visa packet from the US Consulate or Embassy, before you come to the US. Until this payment is made the USCIS will not start production on your green card.
At the time of your interview at the U.S. embassy or consulate, the DOS interviewing officer should give you a USCIS Immigrant Fee handout. This document provides instructions on how to pay the $165 immigrant fee and included your A-Number and DOS Case ID. Your A-Number and DOS Case ID are located in the top right corner.