Process for Physical Delivery in F&O

What happens if I am an e-DIS customer and do not give mandate or mandate proves invalid due to any reason and there is physical delivery for the positions open in my account?

If you are an e-DIS customer and your account does not have the required mandate (to debit the shares to meet physical delivery) for the position remaining open in your account (where you choose Physical settlement or position was not squared off and remains open on expiry) then your open positions will go for Auctions and Auctions charges will be passed on in your account.