For acceptance of a hadith narration, mutaqaddemun (early) hadith scholars require the ittisal al-sanad (continuity of the narrator chain) which is subject to sama' (hearing) condition. In this paper, we address the necessary conditions in order to count a narrator chain as continuous. First, we investigate whether a hadith is acceptable when it is narrated as mu'an-an and examine whether it holds the sama' condition if it is accepted. In this regard, narrations of mutaqaddemun hadith scholars and their applications are taken into consideration. Second, we focus on the distinctive features between mu'en-en and mu'an-an hadiths, then investigated the acceptance conditions of mu'en-en hadiths. Finally, we studied the purpose of narrating hadiths by these methods and their impacts on the sihha (genuineness). Furthermore, these methods are evaluated based on mutaqaddemun hadith scholars' approaches.