Method of verifying whether someone is a Mufti
Q: What is the proper Islamic method of verifying whether someone who publicly presents himself as a Mufti is genuinely qualified?
Suppose a person claims to have studied the Mufti course under certain scholars or at a particular institution, but those teachers or that institution choose not to publicly confirm or deny his qualification. At the same time, some other scholars and members of the community question whether he is truly qualified or even properly trained. In such a case:
1. Is a person’s own claim that he studied the Mufti course and was authorized normally sufficient, or does claiming the title of Mufti require independent verification?
2. What actually establishes that someone is a Mufti: completion of an Ifta course, a formal ijazah or diploma, recognition by qualified scholars, demonstrated ability in fatwa, or a combination of these?
3. If the institution or teachers remain silent, should anything be inferred from their silence?
4. If scholars themselves disagree regarding the person’s qualifications, how should students and the general public proceed?
5. Can a person’s fatwas, writings, teaching, and demonstrated knowledge be used by qualified scholars to assess whether he is actually fit to issue fatwas, even if his formal credentials are unclear?
6. Is there a distinction between someone being an Alim and being qualified to independently issue fatwas as a Mufti?
7. How much verification is required from an ordinary Muslim before taking religious rulings from someone? Can they rely on public reputation, or should they refrain when there are serious doubts?
8. Finally, when does questioning or investigating someone’s scholarly credentials become impermissible backbiting or slander, and when is it a legitimate or necessary form of protecting people from taking knowledge from someone unqualified?
I am asking for the general principles rather than a ruling on any specific individual.