To reset the password for a Zerodha account in case of lost access to the linked mobile number and email ID, it is necessary to update new contact details. These contact details can be updated either online or offline.

Online

1. Download the account modification form (PDF).
2. Mention the existing details and the new details that are to be updated.
   
   
   
   
3. E-sign the forms. To know the steps to esign a form, see How to esign documents on Digio?
4. Create a ticket and attach the e-signed account modification form.
   

Offline

1. Print the account modification form (PDF).
2. Mention the existing details and the new details that are to be updated.
3. Courier it to Zerodha Head office:

Zerodha,
153/154, 4th Cross, J.P Nagar 4th Phase,
Opp. Clarence Public School,
Bengaluru - 560078

It takes 24 working hours for the details to be updated after the courier is received. The password can be reset after the details are updated. To learn more, see How to reset the password on Kite web?