A broker whose listing has expired has given the seller the names of buyers who were shown the property prior to the termination of the listing. What listing contract clause requires this action if the brokerage is to earn a commission on a later sale to one of the named buyers?

A due diligence clause typically refers to a period during which the buyer investigates the property to ensure it meets their standards before finalizing the purchase. While important in real estate transactions, it does not pertain to the broker's entitlement to a commission after the listing has expired.

The procuring cause clause relates to the concept of who was responsible for bringing a buyer to the transaction. While it can influence commission disputes, it does not specifically address the scenario where a broker provides names of buyers after a listing has expired, unlike the protection clause.

An MLS permission clause is concerned with the broker's ability to list properties on the Multiple Listing Service and obtain permission for marketing. While it plays a role in the listing process, it does not relate to the payment of commissions for sales occurring after the expiration of a listing agreement.