Is it permissible to donate all the money of a dying patient who agreed with difficulty or is not fully aware, with the family's consent?

If a patient's intellect weakens and their words become unreliable, it is not permissible to give charity from their money. This is because the money is theirs and has not yet become the inheritance of their heirs. Furthermore, they did not dispose of it or make a will for its disposal while they were of sound mind.