What is the legal ruling regarding the mortgage of a plot of land in 1955 for 100 Jordanian Dinars, the document of which was discovered in 2011 after the death of both the mortgagor and the mortgagee? Do the heirs of the mortgagor have to return the 100 Dinars to the heirs of the mortgagee, taking into account the value of the Dinar at that time?

The heirs of the mortgagor must pay the one hundred dinars to release the mortgaged land. The change in the value of the one hundred dinars from what it was does not affect this, for the borrower or his heir is only obligated to return the equivalent of the loan. For a debt is repaid with its like. If the old currency is no longer available, then the debt must be paid with the new currency at the time the debt became due and the old currency ceased to exist.