Seyyed Hossein, Seyed Mousavi, Hassan Shojae`Bahar, The Blasphemy by Death of Ignorance, Based on Acknowledgement Hadith, The Social Sciences, Volume 11,Issue 5, 2016, Pages 754-759, ISSN 1818-5800, sscience.2016.754.759, (https://makhillpublications.co/view-article.php?doi=sscience.2016.754.759) Abstract: Imam’s acknowledgement Hadith is one of the continuous valid Hadiths between Shiites and Sunnis. This has been focused by the researchers due to a multidimensional issue. But, a significant question is that what is meant by “death of ignorance”? Responding the question, two perspectives have been raised by researchers; some believe that the “death of ignorance” means dying while being infidel, hypocrite and unbeliever; others say it means dying while being in the state of sin and rebellion but not blasphemy. Researcher believes that, we can’t excommunicate someone due to his/her ignorance toward the present Imam. Keywords: Acknowledgement Hadith;ignorance death;knowledge of Imam (knowing the present Imam);excommunication;death