My DH didn`t want me using my credit card, so I asked our banker if there was another way, and SHE said open an account just for on line buying. Put in a smaller amount, about what you think you will use up in a month or so. Mark the card for on line only, and keep it at home so you don`t get them mixed up. When I order on line I write it in my checkbook in red ink. Then I know when the card is getting low. This card will appear in your monthly statement.