Methods and devices are provided for reading both chip and magnetic stripe cards, and in particular for preventing use of a magnetic stripe when a chip is present, in various settings such as fuel dispensers, ATMs, and retail settings. For example, a card reading device is provided that includes a housing and at least one card slot. A smart card reader and a magnetic stripe card reader are disposed within the housing. In one embodiment, a gate is configured to prevent insertion of a card into a rear portion of the card slot when a chip is detected to prevent the magnetic stripe card reader from reading a magnetic stripe. In another embodiment, a first card slot has a first depth that prevents insertion of a magnetic stripe but allows reading of a chip, and a second slot has a depth that allows insertion of a magnetic stripe.