There are three types of judges: One is the Qadi, and he is in charge of settling the disputes between people over transactions and penal codes. The second is the Muhtasib, who is in charge of settling any breach of law that may harm the interests of the community or property. And the third is the judge of Mazalim, who is in charge of settling disputes between the people and the State. .

These are the three types of judges. As for the evidence about the judge who settles disputes between people, this is derived from the actions of the Messenger of Allah (PBUH), and from his appointment of Muadh Ibnu Jabal over an area of Yemen. As for the evidence of the judiciary regarding the settling of disputes which endanger the interests of the community, where the judge is known as the Muhtasib, this is confirmed by the action and saying of the Messenger of Allah (PBUH), for he said: .

"He who cheats us is not one of us". [This is a part of a hadith narrated by Ahmad on the authority of Abu Huraira.]. Thus, He (PBUH) used to challenge the cheaters and punish them. .

He (PBUH) used also to order the traders to speak the truth in trading and give charity. Ahmad narrated from Qays Ibnu Abi Gharza Al Kinani, he said, “We used to buy cargo in Madinah and we would call ourselves brokers, so the Messenger of Allah (PBUH) came out to us and called us with a better name, He (PBUH) said: .

“O traders, verily the selling entails talking and the taking of oaths, so do mix it with Sadaqah”. .

Ahmad also narrated from Abu Al-Minhal: .

"That Zayd ibn Arqam and Al-Bara' Ibn ‘Azib were partners, so they both bought some silver with cash on the spot and by credit. This news reached the Messenger of Allah (PBUH) so he ordered: 'Where the payment is made on the spot there is no harm, and where it is sold on loan it must be rejected.'” .