Da'i al-Mutlaq
According to Tayyibi Isma'ilism, during the Occultation of the twenty-first imam, at-Tayyib Abu'l-Qasim, a Da'i al-Mutlaq "Unrestricted Missionary", maintains contact with him. The several branches of the Musta'li Shia differ on who the current Da'i al-Mutlaq is.