Upjohn warnings are named after Upjohn v. United States, 449 U.S. 383 (1981), the case in which the Supreme Court made clear that the corporate attorney-client privilege applied to a much wider group of Constituents than the corporation’s “control group.” For more tips on preserving the privilege click here: http://winwinhr.com/workplace-investigations-tips-templates-for-preserving-the-privilege/