Is the father entitled to claim inheritance from his daughter, who willed her entire estate to her only daughter, knowing that the father was absent from their lives?

The sole daughter inherits half as a fard (obligatory share) and receives the remainder of the estate by radd (return) if the deceased has no other heirs. If there are asabah (agnate heirs), they receive the other half. If the father is alive, he inherits one-quarter if the deceased has a child, and the daughter receives the rest of the estate by radd. A bequest to an heir is not valid. The father's separation from his wife does not prevent him from inheriting from her. Issues related to inheritances must be brought before the Sharia courts to verify all heirs, debts, and bequests.