Sign in to your Cashback account, go to "My Account" on the upper right hand side of the page scroll down to the "Linked Cards" tab, enter the necessary information of your card, and click "Link Card".
Sign in to your Cashback account, go to "My Account" on the upper right hand side of the page scroll down to the "Linked Cards" tab, enter the necessary information of your card, and click "Link Card".