POA is not mandatory @ upstox

Zerodha should Also Try

nice move by upstox

Yes very Nice

more easier system is also there in place with brokers whereby you have your demat account with STHL or a cooperative bank , trading account with a broker and financial account with a bank of your choice.
when sold give delivery to broker by nsdl speed e or cdsl easiest and when purchase broker will credit the shares to your demat as per t plus 2.Fund transfer is through neft/rtgc.

SHCL ( stock holding corporation of India ltd ) not STHL …