A wagering contract or a risky contract. It applies to all those contracts which may bring a reward without any human effort or to contracts that involve non-business risks.
Israf
Al-khars
Al-’amin al-khass
Al-ihraz
Al-mukhabarah
Al-ijarah thumma al-ba'i
Al-milk al-‘ammah
Al-sa‘ al-shar‘i
Al-kis al-wahid
Al-mudarabah al-mutlaqah