Electronic Filing System (e-Filing) Update, December 26, 2013 (PDF, 8 pages – 212 KB). The Department of Homeland Security (DHS) U.S. Citizenship and Immigration Services (USCIS) developed the Electronic Filing System (e-Filing) to allow individuals to securely apply for immigration benefits online. e-Filing is a customer service, web-based initiative developed to provide a mechanism for individuals to submit and track the processing of certain USCIS applications and petitions. USCIS is updating the e-Filing Privacy Impact Assessment (PIA) originally published on August 24, 2009 to include the collection and use of Internet Protocol address and browser information as part of detecting, pursuing, and deterring immigration benefit fraud.