certification of a particular person in an unspecified area (إِجَازَةُ مُعَيَّنٍ فِيْ غَيْر مُعَيَّن)
الحديث
التعريف :
A scholar may certify a particular person to narrate all his own narrations, without specification. This is the same as the general certification, or the unconditional certification.