Buying and selling shares become a lot easier and transparent when you are in the demat format. Physical shares used to be a hassle. You would get a transfer deed from your broker which you will have to send to the registrar/company to get the certificates transferred into your name. In the demat system, you just need to give a debit instruction slip (DIS) to your broker for debiting the shares to your demat account. When you buy shares, they will be automatically credited to your demat account. Things were so much complicated in the physical shares scenario. Buying shares, selling shares, change of address, getting corporate actions were all a lot more complicated. The entire process has been sorted out under the demat format.