Delay all future trades with the counterparty until the failed trade automatically expires.

Immediately cancel the trade and rebook it with the original trade date.

Transfer responsibility for the failed settlement to the middle office because trade validation has already been completed, allowing the back office to focus on end-of-day accounting and cash reconciliation while awaiting updated settlement instructions.

Ask the investment banker who originated the trade to renegotiate settlement terms with the client.

Reconcile the trade details, validate the SSI, investigate the settlement mismatch with the custodian and counterparty, process any partial settlement correctly, and monitor the remaining failed position until resolved.