A dual mode payment interface device has a touch display and alternatively operates in a first mode and a second mode. The first mode provides access to a merchant system interface (MSI) on the touch display and provides access to a customer system interface (CSI) on the touch display. The second mode provides access to a CSI on the touch display and does not provide access to the MSI on the touch display. The system also includes a merchant display device having a second touch display. The merchant display device provides access to the MSI on the second touch display. The system also includes a wire that provides a communicative connection between the dual mode payment interface device and the merchant display device. The second mode is enabled by the communicative connection.