For the change of name in your account you need to submit the following documents in the nearest Kotak Securities Branch:
Written request in the form of KYC application form link: Request letter to be submitted by the Client to the Participant for minor correction in name of the account holder in demat account
PAN card
AADHAAR card
Passport
Driving License
Voter’s identity card issued by the Election Commission of India;
Job card issued by NREGA
For more details check the link given: Policy procedure for minor correction of name of an individual in a demat account
Reason for name change Documents required:
(a) On account of marriage:
Marriage Certificate or
Copy of Passport showing husband’s name or
Publication of name change in official gazette
(b) On account of reasons other than marriage:
Publication of name change in official gazette
Change in father’s name
Publication of name change in official gazette
For more details check the link given: Procedure for change of name in individual Beneficial Owner’s account