- If the shares were sold before.

- When the shares are retained at another brokerage firm

- The shares are mortgaged to any financial authority the client deals with

- If the client requested to sell a number of shares that is more than the
number of shares he owns and available in the central registry at Qatar
Exchange

- When the client has another NIN issued to him from Qatar Exchange and has not
been merged into his account at The Group

- Availability of sell order in the same trading session on the same company
and another sell order was entered so that the total number of shares in the
two orders was more than the number of shares available to the client