When studying the legal history of Islam, one stumbles upon many scholars who reportedly changed their legal affiliation and more than once in some cases. The motives and causes of such changes are varied and complex. Nonetheless, it can be an important phenomenon especially when many well-known scholars are included. My research intends to study and analyze this phenomenon in its important aspects such as compiling the figures who changed their affiliation, identifying the motivations and causes of the change, and most importantly, what this phenomenon can teach us about the nature of the schools of law. It focuses on the cases in the Mamlūk context and compares them with the cases before. Moreover, it pays special attention to the establishment of four of the chief judgeships, and the impact on the phenomenon of change