Climate change represents one of the most pressing challenges of our time, with especially profound impacts on vulnerable communities and a tendency to intensify social, economic, and environmental inequalities. In this context, the concept of climate justice has emerged as a critical framework for addressing the impacts of climate change through a human rights lens. Initially developed within corporate law, the principle of due diligence has evolved into international human rights standards, serving as a valuable tool for holding companies and states accountable for their environmental and social impacts. Consequently, climate due diligence emerges as an essential tool in the ongoing fight against climate change.