I have a question for you. Let's say a trader on the cash trading desk buys shares from a short-seller who fails to deliver. Does sec lending know that those s

I have a question for you. Let's say a trader on the cash trading desk buys shares from a short-seller who fails to deliver. Does sec lending know that those shares have not yet settled? If it is incorrectly assumed that those shares settled properly on T+2, would the bank potentially loan those shares out prior to delivery?