If halfway through a transaction and the card machine says return to base please place the handset on the base unit as it is likely it requires a download to continue processing transactions. To prevent this from happening it is advised to turn the handset on before trading hours so that it can self update.
In this situation, the terminal is trying to re-establish a connection with the base. Please ensure the base is plug in, and this should resolve the issue. If the problem persists, please call us on 0845 459 9984.