Is the commission you received for referring a customer to another company that rerouted a non-compliant shipment considered unlawful (haram)?

The commission from the shipping company for referring some individuals to it is permissible, as long as the transaction is permissible and took place outside official working hours. The company's deception regarding the specifications of the shipment does not render the commission unlawful, because the referral was for a permissible purpose and the referrer was not aware of the deception.