Ideally, you should not divulge your Demat account number to anybody. The client ID of your Demat Account may be found using your Demat account number. And, because login credentials, such as the customer ID, are used as a security check, they must be kept private by you. Shares, bonds, and other securities may be held in your Demat account. As a result, you must safeguard its security, as account hacking, account mismanagement, illegal transactions, and other such activities are growing more widespread these days.