- Log in your administrator panel and click on the Discounts and coupons link in the CATALOG side box on the left.
- Open one of the tabs, the Global discounts tab (for instance), and create a coupon using the Add new discount(s) form selecting Coupon in the Type option.
- Click on the details link of this coupon.
- Enter the desired value of the coupon in the Value option, select the desired variant in the Type option.
- Enter the desired time of using this coupon into the Times to use option.
- To allow a customer to use this coupon only once select the Once per customer check box.
- Click on the Update button.