This case is about a German company, active in developing and exploiting windfarms and other sources of renewable energy. What makes this company interesting is that it relied on less conventional ways of financing, issuing Profit Participation Certificates (PPCs) instead of bonds or shares. The company mainly targeted individual investors, and offered them certificates with an annual return between 6% and 8%. The company was fairly successful in attracting these “household investors”, growing the invested capital roughly by 50% year on year. This type of funding is sometimes referred to as “crowdlending”. Based in Itzehoe, near Hamburg in Germany, Prokon was founded in 1995 by Carsten Rodbertus. The company was established to leverage sources of renewable energy in order to secure a sustainable, environmentally sound and responsible energy supply. In 2011 Prokon’s portfolio consisted of projects and concepts for a future free from dependency on the “potentially harmful and limited”1 resources of oil, natural gas, coal and nuclear power. The company invested in wind energy, biofuel and biomass. Most of its resources were focused on planning, financing, building and managing (technically and commercially) wind farms, as well as on selling electricity to end customers. Case A takes the perspective of a prospective investor, Ms. Müller, and ends with the question whether or not to invest in Prokon PPCs. Case B picks up when PPC holders have already begun to cancel their investments en masse and Prokon is on the brink of bankruptcy, following increasing claims of a Ponzi scheme. Panic and uncertainty set the tone of the situation.