The World Federation One Stop Fiqh

Ruling 2704

If a person endows some property to specific individuals, such as his children, so that each generation uses it after the previous generation, in the event that the trustee of the endowment gives it on rent and dies after that, the rental agreement does not become void (bāṭil). However, if there is no trustee for the endowment and those from one of the generations for whom the property was endowed give it on rent and after that they die during the rental period, then, in the event that those from the next generation do not endorse the rental agreement, it will become void. If the lessee of the rented property has paid the rent for the entire rental period, he can take back the amount he has paid from the time the agreement became void.