Overview of ROMCIR 2025: The 5thWorkshop on Reducing Online Misinformation through Credible Information Retrieval

ROMCIR 2025: The 5th Workshop on Reducing Online Misinformation through Credible Information Retrieval, is part of the Satellite Events of the 47th European Conference on Information Retrieval (ECIR 2025). TheWorkshop continues to serve as a key forum for advancing research and fostering dialogue on how to improve access to reliable information in an era marked by increasing information disorder. The challenge remains deeply complex, involving heterogeneous sources such as Websites, social media platforms, and multimedia content, across domains like misinformation detection, trustworthy Information Retrieval, propaganda mitigation, etc. In 2025, a growing focus is placed on understanding the dual role of generative technologies-particularly Large Language Models (LLMs)-in both unintentionally spreading misinformation and enhancing the capabilities of Information Retrieval Systems (IRSs). This year's program features keynote talks and peer-reviewed contributions that address critical topics including: the use of crowdsourcing to mitigate misinformation; the interplay between misinformation and LLMs, particularly in relation to fact-checking and rumor verification; and the societal implications of misinformation, with a special emphasis on its impact on children.