Are the checks written by the deceased for the installments of two apartments he bought for his sons considered an immediate debt that must be paid, knowing that paying them all at once exceeds his financial capacity?

Deferred debts become due upon the death of the debtor, according to the majority of jurists. The deferment period ceases, and all debts become immediately payable and are settled from the deceased's estate before its distribution.

If the deceased did not leave an estate, their heirs or relatives are not obligated to pay off the debt, unless they volunteer to do so.

The Hanbalis hold that a deferred debt does not become due upon the death of the debtor if the heirs or others secure it with a pledge or a solvent guarantor.

There is another narration from Ahmad stating that the deferment period does not cease upon death at all.