It is commonly asserted that the successful management of common property resources (CPR), and by extension, the provision of public goods such as biodiversity and carbon, requires the devolution of control to local communities. However, where trust in community institutions is low, the intrinsic motivation to co-operate may be diminished. In this study, we carried out surveys and framed field experiments on the introduction of payments for ecosystem services (PES) to Namibia’s communal conservancies, established under the community-based natural resource management (CBNRM) programme.