What is the ruling on selling electrical appliances printed with indications and phrases that contradict the truth in terms of capacity and brand to wholesalers, with their knowledge of their true nature, who then in turn deceive people, and what must one who has done this do to repent, knowing that his profits from this work constitute a large percentage of his wealth?

If a Muslim sells a defective product knowing that the buyer will use it to cheat people, this sale is forbidden because it aids in deception. The ruling for such a sale is mandatory annulment unless it has already been executed. If the sale has been executed, scholars differ on what the seller must do with the price of the defective product. The most equitable opinion is that the seller must donate the surplus of the price paid by the cheating buyer over the price paid by someone who does not intend to cheat. However, if the seller does not know or doubts the buyer's intention to cheat, the sale is valid, and nothing is incumbent upon the seller.