Corruption is one of the most destructive and pervasive wicked problems, present in commercial enterprises, governmental agencies and Non-Government Organisations (NGOs). The reduction of corruption is prominent amongst the United Nation's Sustainable Development Goals, but research on corruption in the context of NGOs in developing countries is scarce, particularly relating to the identification and management of corruption in this context. This paper adds new insights to this under-researched field by providing a rich description of a single, longitudinal ethnographic case study of one NGO in Bangladesh, which has successfully identified and managed (out) complex, entrenched corruption through a simple sustainable intervention: expanding and improving information channels for stakeholders.