Is it permissible for a customer to benefit from a prize awarded by a company that held a lottery competition, if the competition official chose him to win without a draw, and the customer was aware of this, while the rest of the customers knew about the competition without knowing the winner or how he won?

A competition in which participants do not pay money is permissible, and its prizes are gifts or encouraging rewards. As for choosing a winner without a lottery, it is not permissible if it involves deception and fraud towards the rest of the customers. If it is done outside the lottery procedure in an announced manner, its permissibility depends on the company owners' authorization of the responsible person. If he is authorized, then there is no harm; otherwise, he is not permitted to do so, and the customer is not permitted to accept the prize if he is aware of the situation.