No, you cannot submit a Delivery Instruction Slip (DIS) at a Zerodha branch office. You must courier the DIS, along with a hard copy of the Client Master Report (CMR) from the other broker, to the following address:
Zerodha Customer Support Centre
192A 4th Floor,
Kalyani Vista, 3rd Main Road,
JP Nagar 4th Phase,
Bengaluru, 560076