In recent decades, corporate communication has undergone significant changes in terms of channel, content and receivers. To be accountable, companies are called upon to satisfy a plurality of stakeholders who are increasingly interested in nonfinancial information. In addition, the type and scope of information can significantly influence the competitive advantage of the company and especially, its credibility and reputation. Today, companies are required to engage in corporate social responsibility (CSR) initiatives to give response to the call for action from their stakeholders and society. However, some companies engage in CSR initiatives with the aim of only achieving or increasing their level of legitimacy. When companies offer misleading communication and then try to influence the perceptions of their stakeholders, they incur the phenomenon known in literature as "greenwashing". Thus, the aim of this work is to analyse the phenomenon of greenwashing, tracing its evolution in the extant literature. Greenwashing will then be analysed through the lens of the legitimacy theory and starting from Habermas's communication theory to define and broaden the relationships between the concepts of disclosure, credibility, legitimacy, perception and greenwashing.