Auction market price

Hello Friends,
If call option expires ITM and I don’t have stock in my holding to give, in this case broker/exchange will buy for me and deliver to the party, how do I know the price of buying in auction market .?
Thanks

You will receive the auction contract note which will have this details. You can check out how the process works here:

Hi ShubhS9 Thanks,
How about other charges, like any penalties, interest charged by broker/exchange also mentioned in the Contract Note or Ledger .? Or any other invoice?