What is Suretyship The Arabic expression Rahn, which means 'surety', refers to providing anything of value as insurance for a debt.Suretyship in law: Suretyship is defined in law as an agreement between two people, through a legal contract, in which the debtor grants ownership of something of his own or a sum of money to the creditor, with the right to retain ownership of the mortgaged thing for the debtor, according to certain conditions of the mortgage that we will talk about in our topic.If the debtor fails to fulfill his debt, the surety may be utilized or sold to satisfy the creditor.Its legality is based on a Qur'anic text stating that debts must be verified.o The mortgaged: the creditor in whose possession the mortgage becomes.