Read this Before Issuing Fatwa

Imaam Maalik (may Allaah have mercy on him) said, “It is not proper for a person to consider himself qualified for something until he has asked one who is more knowledgeable than him. I did not issue fatwa until I asked Rabee’ah and Yahyaa bin Sa’eed and they permitted me to do so. If they had asked me to refrain from it, I would have done so.”

He also said: "I did not sit [in the masjid to teach and issue fatwa] until seventy Shaykhs among the people of knowledge testified for me that I am qualified to do that.”

Source: Qawaa’id fee at-Ta’aamul ma’a al-Ulamaa’, p. 27 by Shaykh Abdur-Rahmaan bin Ma’llaa