Corruption has a terrible economic impact on the world's poorest people. Corruption means there is less money to develop, and poor people miss out on crucial services such as healthcare and education.
The problem is global as well as local. Corruption practices takes place at every level in business, financial transactions, by individuals and government contracts.
All countries, both rich and poor, must sign up to and comply with the United Nations Convention against Corruption.
Awardwinning journalist and radio documentary maker Angela Robson explores the controversial issue of corruption, and highlights what Christian Aid is doing to help.