In the landmark ruling in Google Spain SL, Google Inc. v Agencia Española de Protección de Datos, Mario Costeja González (case no. C-131/12, May 13, 2014), the Court of Justice of the European Union (CJEU) recognized that search engines are controllers of the personal information they process. As such, they have the obligation, in appropriate cases, to de-list links to personal information in their search results.
The Gonzales decision left open questions about the scope of the duty and the criteria to be used in determining what links must be delisted, something which Google, data protection authorities, and others had disagreed about. The Article 29 Data Protection Working Party has now released a Guideline addressing these controversial issues.