Is it Halal to receive commission fee? There is a company selling pure gold product (99.99%) that offers the following commission fee program:a. Every customer who brings ten new customers after buying gold product will receive 400.b. Every time one of the ten new customers brings another ten new customers after buying gold product, 800 commissioning will be given to him and who introduced him to the company (each will receive 400). Refer to the example below:A. Ali buys a gold product. He becomes a customer.B. Ali brings ten new customers who buy gold product and become new customers. Ali will receive 400 as commission.C. If one of the ten new customers that Ali brought brings another ten new customers by buying gold product. Each will receive 400.

Praise be to Allah, the Lord of the World; and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

As a general rule one may take commission for bringing new customers to a company or to anyone else. This commission is known as "Samsarah" in the terminology of Islamic Fiqh.
However, the permissibility of gaining commission depends on the transaction itself. If the transaction between a company and its customers is legally valid then receiving commission on such services is permissible, otherwise it is not permissible.
As you know payments in gold transactions should be hand to hand, any delay in payment or in receiving the gold is not permissible in Shariah. Read the Fatwa: 83301.
Allah knows best.