The Central Securities Clearing System ( CSCS) is an electronic system for depositing, clearing and settlement of security transactions on the floor of the Nigerian Stock Exchange. When you buy or sell shares through a broker, the CSCS records all the transactions that have taken place, noting the volume, price and value. Simply put, it maintain the records of shareholding by all investors.  The major reason for creating the CSCS is to convert the paper based system in the Nigerian Stock Exchange to the electronic or digital system. Get in touch with a reliable broker to get your CSCS number.