What is the ruling on receiving 5% of the fees of a money transfer company in exchange for bringing customers to it?

The question involves two issues:

1. The percentage taken by the money transfer company: There is no objection to it. It is a known ijara (lease/hire) with a specified fee (3%) of a known amount, and it does not involve any ignorance (jahala) or excessive risk (gharar).

2. What the questioner receives from the company for his service: This is called "brokerage" (samsara), which is permissible in principle. However, because it is a percentage of the output (and not a fixed wage), it is considered a void ju'ala (stipulated reward) by most scholars, although some have permitted it.

Therefore, a known wage or a fixed reward should be determined to avoid this difference of opinion. As for the large amount of money received monthly, there is no objection to it if the transaction is valid.