Abstract
Removing the fabricated and forgery sayings from the reliable Ahadith heritage is the prominent work of Muslim Scholars which was made possible due to their ever-lasting struggle, sincerities and miraculous memorization. In other words, it is the gift of Allah which He bestowed upon them due to which they scrutinized and examined Ahadith of the Holy Prophet (PBUH). They made firm rules for distinguishing the authentic and acceptable Ahadith collection from the forgery. They picked out those Ahadith, in which there was some type of defect like an expert who picks out the fake coins from the genuine one. “Imam Ibnul Mulaqqin” is one of these Ahadith experts who made excessive work in pointing out the reasons of hidden weakness in Ahadith. So this article deals with his methodology of work through his historical book “Albdrul-Muneer” and what about the main principals of the authenticity of Ahadith according to him