Yes, the cashback promotion is also valid when using a voucher code. A cashback is a promotion that is organised by the manufacturer of the product and is processed directly between the manufacturer and the customer. Please note the conditions required by the manufacturer. Here you can find more information about the Sony Winter Cashback: Up to 500 francs Winter Cashback on Sony cameras, lenses and accessories

hello hello, I don't really know, because I bought it before the cashback.