For the buyer to keep something as mortgage in case of a third party’s later claim on the goods; withholding a part of the price as a mortgage.
Bai‘ al-fuduli
Islamic Trust Funding
Sadaqah al-sawa’im
Whole Life Insurance
Bay` `ajil bi-ajil
Diwan al-khazin
Diwan al-sawafi
Shirkah al-‘aqd
Sahib al-kharaj
Ihya al-mawat