What is the ruling on taking 500 Saudi Riyals as commission from a relative after informing him that the return on every 10,000 Riyals is 1,500 Riyals, knowing that the actual return from the investor is 2,000 Riyals, and is it permissible to inform him that there is an intermediary who takes this amount without disclosing the intermediary's identity?

The arrangement between the questioner and his friend, involving the investment of his money in exchange for a predetermined sum, is impermissible. Therefore, it is necessary to correct the method and adhere to the regulations of legitimate Mudarabah (Islamic partnership), such as not predetermining the profit for the capital owner and not guaranteeing the capital from the worker. If the questioner wishes to mediate between his relative and his friend in investing his money, the investment must be lawful. It is not permissible to facilitate an incorrect transaction, whether for a fee or without. However, if his relative wishes to enter into a valid Mudarabah with his friend according to Islamic regulations, there is no harm in the questioner facilitating it for a known fee (brokerage). It is not obligatory to inform the relative that the questioner will be the one taking the fee, as long as the relative knows and agrees to pay it to whoever performs the service. This is because Ja'alah (commission/reward for a service) does not require identifying the worker, and brokerage falls under this category, as evidenced by the verse: "And for he who brings it is the burden of a camel, and I guarantee it."