On the pay-in day, the day securities are to be delivered to the clearinghouse, the Clearing Corporation (e.g., NSCCL) is responsible for identifying any short deliveries by clearing members.
The Clearing Corporation performs the following:
It monitors and reconciles securities submitted by clearing members.
It detects any quantity or quality shortfalls in securities needed to meet settlement obligations.
It initiates actions like buying-in auctions to cover short deliveries.
This process maintains the integrity and ensures the timely completion of the settlement process.