For universal merchant discount codes that are not tied to a user's account, we will do our best to help customers to apply these discounts on the checkout page. 

Do indicate the merchant discount code under the 'remarks' field of the item you wish to purchase before adding the item to your cart for us to purchase the item.

Also, do note that we are unable to process discount codes for 

For personalized gift cards or discount codes that are tied to a specific account, we are unable to apply them on behalf of the customer.