What is the ruling on commissions received by a tour guide from cafes, shops, and the sale of tours without the client's knowledge, given that the operating company and governmental authorities are aware of this, and knowing that tour prices are determined by mutual agreement and the guide's profit may exceed that of the tour organizer?

Brokerage and intermediation are permissible, and it is permissible to take a commission for them, especially if the employer is aware of it. It is not necessary to inform the client about the commission taken from him because he does not pay it, but it is stipulated that he should not be directed to a place that is worse in terms of price or quality. The intermediation must be for something permissible and not an aid to disobedience. The employer's permission is required to take the commission if it is part of the official work and during working hours.