What is the ruling of Islamic law concerning an heir retracting a gift, and what is the ruling of Egyptian civil law regarding the invalidation of a gift based on the heir's request, and what is the ruling of Islamic law concerning seeking compensation for false accusations, all this pertaining to the gifting of an apartment that was not registered, given that the donor has passed away and her sole heir requested the invalidation of the contract 16 years after its 작성?

A gift is not legally recognized without evidence, and the heir has the right to claim it. The Islamic legal proof of a gift is not limited to official documentation; rather, it can be established by two witnesses or by the heir's acknowledgment. A gift becomes ownership upon possession with the giver's permission, and its documentation or witnessing is not a religious prerequisite. However, legally, the ownership of a gift is not granted to the claimant without valid Islamic evidence, such as the testimony of two just witnesses, the heir's acknowledgment, or official documentation. The Sharia court is not permitted to limit evidence solely to documentation. Financial compensation cannot be claimed merely on the basis of an accusation unless there is material damage.