As digital ecosystems expand in scale and complexity, malicious actors continually evolve their tactics, necessitating highly sophisticated defense mechanisms. The 1st Workshop on AI for Fraud and Abuse, held in conjunction with KDD 2026, bridges industry and academia to address these challenges. This workshop highlights the latest advancements in artificial intelligence tailored for trust and safety, with a specific focus on leveraging Generative AI, addressing real-world application challenges, navigating ethical and regulatory landscapes, and advancing open science through benchmarking. Through a combination of expert keynotes and peer-reviewed technical presentations, the workshop aims to foster collaboration and accelerate the development of robust, scalable fraud detection systems.