Who can nominate?

Nomination can be made only by individuals holding beneficiary accounts either singly or jointly. Non-individuals including society, trust, body corporate, karta of Hindu Undivided Family, holder of power of attorney cannot nominate.Who can be a nominee?
Only an individual can be a nominee. A nominee shall not be a society, trust, body corporate, partnership firm, Karta of Hindu Undivided Family or a power of attorney holder. 
Transmission of demat securities

What is transmission of demat securities?
 Transmission is the process by which securities of a deceased account holder are transferred to the account of his legal heirs / nominee. Process of transmission in case of dematerialized holdings is more convenient as the transmission formalities for all securities held in a demat account can be completed by submitting documents to the DP, whereas in case of physical securities the legal heirs/nominee/surviving joint holder has to independently correspond with each company in which securities are held. 
In the event of death of the sole holder, how the successors should claim the securities lying in the demat account?

The claimant should submit to the concerned DP an application Transmission Request Form (TRF) along with the following supporting documents
1. In case of death of sole holder where the sole holder has appointed a nominee
    Notarised copy of the death certificate

2. In case of death of the sole holder, where the sole holder has not appointed a  nominee
    Notarised copy of the death certificate
    Any one of the below mentioned documents –
        Succession certificate
        Copy of probated will
        Letter of Administration
The DP, after ensuring that the application is genuine, will transfer securities to the account of the claimant.