Whistleblowing is one of the most effective ways of exposing and remedying corruption in both the private and public sector. The act of whistleblowing can be understood as exercising one’s right to report wrongdoing, which is an extension of the right to freedom of expression. Some countries have elevated this right to the status of an obligation, imposed on different categories of individuals. While in some cases, these obligations are applicable to citizens in general, in other countries, provisions refer only to public officials. Specific references to corruption are not always present; in many cases, legislation requires individuals to report on any type of wrongdoing witnessed, which includes corruption, but also other types of felonies and misdemeanours. The existence of a duty to report corruption and other forms of wrongdoing cannot replace a proper whistleblowing policy and protective measures. Moreover, in many countries, the obligation to report crimes and/or corruption is not found in the law but has been included in other documents that do not have legal status, such as codes of conduct.