Opinion Essay Collection of opinion essays that have appeared in the newsletter of the Anti-Fraud Office of Catalonia. By subscribing, you will be able to obtain information regarding the actions of the Anti-Fraud Office and other issues related to its scope. Brief reflections on the transposition of Directive 2019/1937, concerning the protection of persons reporting infringements of Union law Silvina Bacigalupo, Professor of Criminal Law at the Autonomous University of Madrid and President of Transparency International Spain