Sale or purchase of gifts before they had been accepted. The Prophet (peace be upon him) prohibited this type of sale.
Leasing Certificate
Riba al-nasi'ah
Al-fakkak
Al-‘afw
Daman al-t'arrud
Irsad
Maysir
Arbun
Sahib al-kharaj
Bai‘ al-sadaqah hatta tuqbad