Issuer Qualifications
See also: Ijazah and MadrasahDuring what is often referred to as the Islamic Golden Age, in order for a scholar to be qualified to issue a fatwā, it was required that he obtained an ijazat attadris wa'l-ifta ("license to teach and issue legal opinions") from a Madrassah in the medieval Islamic legal education system, which was developed by the 9th century during the formation of the Madh'hab legal schools.
Read more about this topic: Fatwā