Epistles arrived from Master of Age regarding Islamic commands and prohibitions and replies to queries of Shia about that which they were in need of, through Uthman bin Saeed and his son, Abu Ja’far Muhammad bin Uthman in same handwriting in which they came during the period of Imam Askari . Thus the Shia always trusted the honesty of these two gentlemen till Uthman bin Saeed passed away and his son, Abu Ja’far performed his last rites. After that all responsibilities of the father were transferred to the son and all Shia were confident of his integrity since clear directions had come from Imam regarding his honesty and also command for Shia to refer to him, whether during the time of Imam Askari or after his martyrdom and even during the time of his father, Uthman.