On February 3, 2015, European data protection regulators released the Cookie Sweep Combined Analysis Report analyzing how websites use cookies to collect data from European citizens and highlighting noncompliance with Article 5(3) of the EU’s ePrivacy Directive. Among other requirements, this directive mandates that website operators obtain users’ consent for the use of cookies or similar tracking technologies. Notably, the directive purports to reach beyond the borders of European Union to apply to any website directed to or collecting data from European citizens.

To compile data for the report, the EU’s Article 29 Data Protection Working Party conducted a sweep of 478 of the most frequently visited websites in the e-commerce, media, and public sectors in eight EU Member States. The sweep targeted websites in these sectors because they likely pose the greatest risk to data protection and privacy for European citizens. The cookie sweep consisted of two stages: (1) a statistical review of cookies used by the websites and their technical properties; and (2) an in-depth manual review of cookie information and consent mechanisms. The study recorded each website’s cookie notification method, the visibility and quality of cookie information provided, and the mechanism offered for users to express consent.