Corporate Social Responsibility (CSR) has consolidated itself as one of the strategic pillars of organizations, influencing reputation, competitiveness, and the relationship with consumers. This study examines the attitudes of Generations X, Y, and Z towards CSR practices, exploring the impact of these perceptions on purchase intention. In addition, it investigates the perception of the greenwashing phenomenon, with a particular focus on Generation Z, which is often considered more sensitive to sustainability issues. The research adopted a quantitative approach through an online questionnaire administered to 223 respondents, of which 218 were considered valid and distributed across the three generations under analysis (1965–2009). Data were processed using SPSS software, allowing the evaluation of knowledge levels, attitudes, and the influence of CSR on consumer behavior. The results show that Generation X demonstrates greater knowledge of CSR practices, while Generation Z reveals comparatively lower levels of concern. Generation Y displays balanced and consistent values across the different dimensions studied. These findings contribute to the intergenerational understanding of the relationship between CSR, trust, and purchase intention, offering relevant insights for companies and marketing professionals in designing ethical and differentiating strategies.