Is it obligatory to give in charity the value of the original headphones sold by the parent company after selling counterfeit headphones that were purchased on the assumption that they were original?

It is not permissible to counterfeit trademarks without the permission of their owners, due to the violation of their rights and the financial harm inflicted upon them. The counterfeited product itself is a permissible and valuable asset; it is not necessary to destroy it. Rather, it is permissible to benefit from it by clarifying its condition and not using it for deception. The right of the trademark owner is against the one who infringes upon their right, while the product itself is adulterated. An adulterated item is not to be destroyed but rather utilized in a permissible manner, or given as charity to the poor. Therefore, it is permissible to buy and sell counterfeited goods provided their condition is clarified, and the right remains with the owners of the original trademark against the counterfeiter who produced it.