From the Manage Cards Control Menu, select “Merchants”. Toggle on next to “Enable Merchant Controls” to set the merchant limits. Then, select the merchant type from the list of merchants. Click on the desired merchant, and toggle on. You can choose to allow certain cards to be used only for specific types of merchants. For example, a card could be designated for use only at gas stations – and all other merchant types could be blocked for that specific card. These limits apply to online ecommerce transactions as well as in-store transactions.