The production of waste is continuously increasing worldwide, presenting a growing challenge for the environment, society, and the economy. At the same time, it is becoming increasingly important to ensure access to sustainable energy that is available to everyone. In this context, Waste-to-Energy (WtE) technology, which enables the conversion of waste into energy, represents an effective solution to these challenges. Waste often contains components with high energy potential that can be utilized for fuel production. This not only reduces the amount of waste ending up in landfills but also uses waste as a valuable resource. WtE technology also contributes to achieving circular economy goals by promoting the circular flow of materials and energy. Instead of simply discarding waste, this approach allows for its conversion into useful fuel. Through the categorization of fuel derived from different types of waste, proper waste management is achieved, the energy potential of materials is identified, and the most appropriate processing and utilization methods are determined. This practice ensures that the produced fuel from waste meets specific requirements and is used in a manner consistent with relevant guidelines and regulations. The aim of this final paper is to provide a deeper understanding of the categorization of fuel from waste, explore its role in sustainable waste management, and analyze the challenges and difficulties encountered in the categorization of fuel from waste and its practical use.