TRANSFER CUM DEMAT IS NOT POSSIBLE IN NSDL AS WELL AS CDSL.
TRANSPOSITION cum DEMAT is possible in NSDL as well as CDSL
The DP should ensure that the name in the Demat Account is identical to that which appears on the certificate(s) to be dematerialized, if any. In the case of a joint account, the names of the holders should be in the same order as appearing in the share certificate to be dematerialized, if any. Account to be opened in Fully Expanded Name or in the name present in the PAN Card.
Dematerialization : Dematerialisation is the Process of converting Physical Shares into Electronic form, Primary Objective of Depositories Act is Dematerialisation. Securities in Demat form are Fungible. They do not have any Folio/Distinctive/Certificate No.
only those securities whose ISIN has been activated by the depository, can be dematerialised in the depository system.