Explanation:

Gift of Spes-Successionis  - Gift of Spes-Successionis:

Gift of the Spes Successionis is also void. Spes Successionis means a mere expectation of getting certain properties through succession. A son after the death of his father inherits his properties as legal heir and such properties are vested in him. But, before the death of father, the son has simply a chance or expectation of getting his property through inheritance because he may or may not survive his father.

Gift of mere chance of inheritance - A contingency is a possibility, a chance, an event which may or may not happen. Under Islamic law, conditional or contingent gifts are void.