Understanding USCIS and ICE: How Immigration Fraud Referrals Work We explain how USCIS referred 14,400 foreign nationals to ICE last year for suspected fraud or criminal history, and break down the Department of Homeland Security structure. We discuss how USCIS handles immigration services like green cards and status changes, while ICE handles enforcement. We clarify how USCIS communicates with ICE when fraud or criminal issues are suspected, and emphasize the importance of staying out of troubl