["Business Ethics, the Environment &Responsibility, EarlyView. ", "\nABSTRACT\nThis study investigates the phenomenon of corporate social responsibility (CSR) decoupling, wherein firms' CSR disclosures diverge from their actual CSR performance, often resulting in misleading portrayals of environmental and social commitments commonly associated with greenwashing. Drawing on resource dependence and agency theories, the research examines how specific board attributes—board tenure, board‐specific skills and board cultural diversity—function as governance mechanisms to reduce CSR decoupling by enhancing board effectiveness in aligning managerial actions with stakeholder expectations. Using a large international sample of 14,004 firm‐year observations from 34 countries between 2012 and 2023, the study also explores the moderating role of board gender diversity, an area underexplored in prior research. The results confirm that longer board tenure, greater board‐specific skills, and higher board cultural diversity significantly reduce CSR decoupling. However, the presence of female directors unexpectedly weakens these beneficial effects, indicating a complex and nuanced interaction between board gender diversity and other board characteristics in shaping CSR outcomes. These findings contribute to the literature by clarifying how corporate governance mechanisms influence the authenticity of CSR engagement, highlighting the importance of considering gender diversity as a moderator in governance studies.\n"]