Artificial Intelligence (AI), and Machine Learning systems in particular, often depend on the information provided by multiple agents. The most well-known example is federated learning, but also sensor data, crowdsourced human computation, or human trajectory inputs for inverse reinforcement learning. However, eliciting accurate data can be costly, either due to the effort invested in obtaining it, as in crowdsourcing, or due to the need to maintain automated systems, as in distributed sensor systems. Low-quality data not only degrades the performance of AI systems, but may also pose safety concerns. Thus, it becomes important to verify the correctness of data and be smart in how data is aggregated, and to provide incentives to promote effort and high-quality data. The aim of the workshop is to encourage discussions and contributions on the following aspects: