The ruling on taking a fee or brokerage commission for intermediation between two parties

Question: It happens in real estate rental offices that amounts are taken from the tenant as a fee. To be more specific, for example: a person came and asked to rent a shop or an apartment, and asked me that if I fulfilled this request of his by finding the shop or apartment, he would give me a sum of money in addition to the rent, as a fee, or in exchange for him obtaining this shop or that apartment. I ask to know clearly: is this money lawful or forbidden?

Answer: There is no harm in that, for this is a wage called a fee, and you must strive to find the suitable place that the person wants to rent. If you help him in that, find him the suitable place, and help him agree with the owner on the rent, then all of this is permissible, if Allah wills, on the condition that there is no betrayal or deception, but rather it is done on the basis of trust and truthfulness. If you are truthful and fulfill the trust in seeking what is required, without deception or injustice to him or to the property owner, then you are on the right path, if Allah wills.