Abstract: FIG. 4 depicts a preferred embodiment upon which a method for communication of data between a sender and a recipient is implemented. The sender utilises a first computer (50) in conjunction with a data correlation scheme (51) to prepare a form. The data correlation scheme (51) correlates available data fields with corresponding printing colours. In the preferred embodiment each of the printing colours are specified in the three digit RGB colour format. The sender prepares a form on which fields (52) and (54) containing data values are coloured in specific printing colours (53) and (57) in accordance with the data correlation scheme (51). The form is printed to a virtual computer, then sent as a data stream from the sender to the recipient. Once received at the recipient's computer (56), the invoice (55) is processed so as to extract the values associated with each of the printing colours (53) and (57).