How transmission will be done for shares in lock-in period?

Lock-in shares will be moved to the nominee/claimant's demat accounts only after the expiry of the lock-in period. Till then, the deceased account will be kept as a 'to be closed account.'

New documents can be asked for if the lock-in period is for more than 6 months, as the validity of the stamp paper is for 6 months only.

To know more about death claims, see What is the procedure for transmission of shares after the death of the account holder if there is a nominee appointed by the deceased?