In order for the SDC to meet its legal obligations, especially the clearing & settlement of securities, it was necessary for the SDC to be developed in stages. Each stage had its own requirements and procedures.

All information and data related to shareholders were registered for the past twenty two years based on manual deeds prepared by brokers or based on the information and data that the public shareholding companies obtained from its shareholders directly. Thus, the registers contained errors and mistakes in the information and data.