Transparency International e.V. (TI) is a German registered association founded in 1993 by former employees of the World Bank. Based in Berlin, its nonprofit and non-governmental purpose is to take action to combat global corruption with civil societal anti-corruption measures and to prevent criminal activities arising from corruption. Its most notable publications include the Global Corruption Barometer and the Corruption Perceptions Index. Transparency International serves as an umbrella organization. From 1993 to today, its membership has grown from a few individuals to more than 100 national chapters, which engage in fighting perceived corruption in their home countries. TI is a member of G20 Think Tanks, UNESCO Consultative Status, United Nations Global Compact, Sustainable Development Solutions Network and shares the goals of peace, justice, strong institutions and partnerships of the United Nations Sustainable Development Group (UNSDG). TI is a social partner of Global Alliance in Management Education. TI confirmed the dis-accreditation of the national chapter of United States of America in 2017.

Corruption is a form of dishonesty or a criminal offense which is undertaken by a person or an organization which is entrusted in a position of authority, in order to acquire illicit benefits or abuse power for one's personal gain. Corruption may involve many activities which include bribery, influence peddling and embezzlement and it may also involve practices which are legal in many countries. Political corruption occurs when an office-holder or other governmental employee acts with an official capacity for personal gain. Corruption is most common in kleptocracies, oligarchies, narco-states, and mafia states.