Is it permissible to give Zakat to a needy person who has adult children, and is it permissible to give it to charitable organizations?

It is permissible to give zakat to a needy father if he is in debt, or if the maintenance provided by his children is insufficient for him. However, it is not permissible for children to give their zakat to their poor or indigent father, because his maintenance is obligatory upon them, and giving zakat would relieve them of this obligation, thereby benefiting them. It is permissible to give zakat to charitable organizations for distribution.