The "EA Black Box" refers to a concept in the field of Effective Altruism (EA) that emphasizes the importance of transparency and accountability in charitable organizations. It suggests that donors should critically evaluate how their contributions are used, ensuring that funds are directed towards effective and impactful initiatives. The "black box" metaphor highlights the need for clarity in understanding the processes and outcomes of charitable actions. In practice, the EA Black Box encourages organizations to provide detailed information about their operations, including metrics on success and areas for improvement. This approach aims to foster trust between donors and organizations, ultimately leading to more effective altruistic efforts and better outcomes for the causes they support.