Update 8/10/2026: Two San Francisco bars that used Patronscan have said they will stop using the system after listening to customers’ privacy concerns. As one news article published in 2019 documented, PatronScan built a network that allowed participating bars to flag patrons and share information about them with other establishments. We reached out to Patronscan with questions regarding their practices and their views on California ID law. California Law Still Bans ID-Scan Databases, And Bars Should Follow That LawIn 2018, California lawmakers closed what they viewed as a loophole. At a minimum, that raises serious questions about how those practices fit with California's existing ID privacy law.