US Patent 8145565 Credit card account shadowing

Account shadowing is provided such that when a charge is made on a first credit card (e.g., a high interest rate credit card) of a user, a transfer of funds is made from a second credit card (e.g., a low interest rate credit card) of the user to pay the charge made to the first credit card. This may transfer the balance from a user's high interest rate credit card to a user's low interest rate credit card. In this manner, the user may receive the reward incentives of a high interest rate credit card while using a low interest rate credit card to satisfy balances due.