However...

However, when it was such that the owner of the property agrees that the borrower utilized the property, as long and unless interest is not made a condition, it is permitted for the borrower in this situation that he can utilize that property Issue 780: It is permissible for people to give an amount to someone in another city and then receive in exchange for that, a lesser amount from the other party.

This is called Hawaalah and it similar to a person who waives his rights for something which is his right. As for when a sum of money is given so that more will be received after a month in another city, for example, one hundred dollars is given to receive one hundred and ten dollars after a month, it is interest and forbidden. Issue 781: When a debtor dies, it is obligatory to pay all of the debt obligatory upon him without waiting for the time period (to expire).