Carbon offsets have become central to corporate and government "net zero" strategies, fueling a boom in projects that promise climate mitigation and community finance. However, investigative reporting has exposed widespread irregularities in this largely unregulated market. This panel explores investigative techniques for tracking offset purchases, verifying project claims, and uncovering corporate greenwashing. Reporters will learn to navigate complex certification systems, identify red flags in project documentation, and hold companies accountable for their climate commitments.