Log in to ComBank, select the product you want to buy and add it to the shopping cart, and select the corresponding ComBank Promo Code to complete the payment. It should be noted that ComBank Promo Code has corresponding conditions of use. The way to check the conditions of use is to click ComBank Customer Center and find My Coupon Code page, then you can browse the ComBank Coupon and there are usage rules at the bottom of each coupon.