Is it permissible for a man to pay the Zakat on his wealth or Zakat al-Fitr to a boy he has purchased?

It is not permissible to give zakat to a boy if the zakat payer owns him through a valid purchase, because his maintenance is obligatory upon his master, and the slave's property belongs to his master. However, if the seller of the boy does not own him through a legitimate ownership, then it is not permissible to buy him, because he is a free person and cannot be sold. The buyer must demand the price back from the seller and return the boy to his family if possible. If the buyer spends on him as an act of charity, then it is permissible to give him zakat if he is deserving of it.