Sale or purchase of gifts before they had been accepted. The Prophet (peace be upon him) prohibited this type of sale.
Al-akl bi l-batil
Bai‘ ’ajlin bi-‘ajilin
Bait al-mal al-khassah
Certificate of Musharakah
Al-thamarah al-baqiyah
Al-waqf al-’ahli
Bai‘ darbah al-gha’is
Al-bai‘ al-mun‘aqad
Kharaj al-wazifah
Tujjar Mutajawilin