Participatory Corruption Appraisals (PCAs) were used in Indonesia to understand how corruption affects the poor. The methodology involved 3 steps: 1) focus group discussions with poor communities to identify corrupt practices and their effects; 2) case interviews with individuals to learn their stories; 3) reporting back findings to spur discussion and follow-up actions. PCAs captured how corruption imposed financial, social, and human capital costs on the poor. It eroded trust in communities and exacerbated their exclusion from public services. Publishing the poor's stories and establishing anti-corruption networks in their communities aimed to amplify their voices and spur corrective actions.