To use Coupons in Citibank shopping, you only need to do the following three steps: 1. Log in or create a new account on citibank.com.sg. Select the Citibank products you like and add them to the shopping cart; 2. Check the product you want to purchase at Citibank; 3. Place the order, click on the Citibank Coupons you got on the checkout page. Select the Citibank Promo Codes you want to use and just complete the payment.