“A clearinghouse is a designated intermediary between a buyer and seller in a financial market. The clearinghouse validates and finalizes the transaction, ensuring that both the buyer and the seller honor their contractual obligations.” Basically Devin wants the records from the clearing houses to make sure any and all short sales are legit. https://www.investopedia.com/terms/c/clearinghouse.asp#:~:text=A%20clearinghouse%20is%20a%20designated,seller%20honor%20their%20contractual%20obligations.