This paper is designed as a reference source and practical tool for all four Divisions of the Immigration and Refugee Board of Canada (IRB)Footnote 1 on issues related to weighing evidence. It includes discussions of possible factors to consider in weighing evidence, as well as relevant case law. This paper is not meant to be exhaustive, nor is the application of the factors and principles discussed herein to be considered mandatory. It is provided simply as a guide to matters that may be relevant in weighing different types of evidence.