Corporate Governance is the process of managing a corporate entity effectively and efficiently by following standard processes, rules and regulations. Across the globe, due to corporate governance scandals many large organizations have either collapsed or having complex problems to run the business. The regulatory bodies like security exchange commission (SEC) in the USA and securities exchange board of India (SEBI) in India are taking proactive measures to make corporate governance more process driven, transparent and efficient. In India, Clause 49 of the listing agreement was introduced to improve the quality of corporate governance in listed companies in the year 2003. In the year 2014, SEBI issued amendments to clause 49 to align it with the new companies Act of 2013. According to the new guidelines, whistle blower policy and vigil mechanism is mandatory for the listed companies. This paper examines whistle blower policy adopted by Sensex 30 companies. The findings of the study shows most of the companies have a vigil mechanism in place. The mode of filing the complaint, protecting anonymity of the complainant, providing independent platforms like whistle blower initiative to file the complaint etc. are the differentiating factors in whistle blower policies adopted by each company. None of the companies have any kind of incentive mechanism for the whistle blower. Regulatory bodies are involved only in policy making and releasing guidelines but not in day to day functioning of the vigil mechanism.