How to use coupons when shopping in Allianz : You add new ones Allianz Add products to cart and click Place Order. Please sign in Allianz by entering details or creating a new account, then click Next to pay. Among the items listed in Allianz you will see a box that says "Add Coupon". You activate the Allianz Coupon of your choice and then you will be automatically returned to the checkout page. There, your actual total payment is already in Allianz reduced.