Figure 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. The recipient's computer 56 also has access to the data correlation scheme 51, either via a functionally identical version, as shown in figure 4, or via remote access to the original version. The recipient's computer 56 then processes the data correlation scheme 51 and the printing colours 53 and 57 so as to correlate the values with the chosen data fields 52 and 54. In this manner, two separate computer systems, 50 and 56, possibly utilising different applications that are not inherently compatible with each other, utilise the present invention for effective communication of data there between.