Digital transaction apparatus including a Data Assistance Device (DAD), including a user interface that is operable to at least select data, and a DAD transmitter, a Digital Transaction Card (DTC), including a Digital Transaction Processing Unit (DTPU), and a DTC receiver, wherein the DAD and DTC are operable to transfer data from the DAD to the DTC and when subsequently using the DTC to effect a digital transaction, the DTC operates in accordance with the data selected and transferred from the DAD to the DTC, the DTC including a biometric reader operable to obtain biometric data of at least one physical characteristic of a user, wherein the biometric reader is connected to the processor for data transfer therebetween, wherein reference biometric data of an authorised user is stored on the processor, and wherein the DTC is operable to compare the obtained biometric data with at least a section of the reference biometric data, such that the authorisation of the user is determined.