The US Customs and Border Protection (CBP) recently added a request for social media identifiers as part of the screening process for the visa waiver program (VWP). This is a unique security screening tactic for the Department of Homeland Security (DHS), marking the first time DHS has requested social media identifiers for immigration benefits or travel application. The Electronic System for Travel Authorization (ESTA) application lists the social media questions as optional. It is too early to assess the consequences of answering (or declining to answer) these new questions. For more information, please see our advisory.