Whistleblower protection is growingly recognised as a key factor to promote a culture of public accountability and integrity. An increasing number of countries is adopting Whistleblowing Protection Legislation (WPL). Good practice WPL includes adopting comprehensive free standing laws that have a broad scope and coverage, provide adequate alternative channels of reporting both internally and externally, protect as far as possible the whistleblower’s confidentiality and provide for legal remedies and compensation. As WPL is still in its infancy, little is known yet on its impact and the conditions of effective implementation.