public function setOrderDiscountAmount($amount, $name = 'Discount', $description = 'Order Discount') {
        $obj = Icepay_Order_Product::create()
                ->setProductID('02')
                ->setProductName($name)
                ->setDescription($description)
                ->setQuantity('1')
                ->setUnitPrice(-$amount)
                ->setVATCategory(Icepay_Order_VAT::getCategoryForPercentage(-1));

        $this->addProduct($obj);

        return $this;
    }