Guidelines 05/2019 on criteria of the Right to be Forgotten in search engines

Exception 2  Processing is necessary for compliance with a legal obligation to which the controller is subject or for the performance of a task carried out in the public interest or in the exercise of official authority vested in the controller

55. The content of this exemption makes it difficult to apply to the activity of search engine providers and it may have influence on the decisions of delisting certain results, as the processing of data by search engine providers is based, in principle, on the legitimate interest of the search engine provider.