Can I de-materialize shares held by a single owner into a joint demat account ?
For de-materialization of shares, the name on the share certificate should match the name on the DEMAT account. If the share certificates are held by a single holder, it can't be dematerialized into a Joint demat account.
If the share certificates are jointly held, the shares have to be dematerialized into a Joint demat account with the same names as on the share certificate.