What type of contract should Broker Ben use to prevent Aaron from paying a commission if his neighbor purchases the property?

Broker Ben should use the Exclusive Right to Sell Contract to effectively prevent Aaron from avoiding payment of a commission if his neighbor purchases the property. This type of contract grants the broker the exclusive right to market and sell the property, ensuring that the broker will receive a commission no matter who ultimately sells the property, including Aaron himself.

On the other hand, the Exclusive Agency Listing Contract allows the owner (Aaron) to retain the right to sell the property on their own without owing a commission, which is not desirable in this scenario. An Open Listing Contract, being a non-exclusive agreement, also permits the owner to sell the property without paying a commission if they find a buyer themselves. Lastly, a Net Listing Contract involves the seller receiving a predetermined amount from the sale, and any excess goes to the broker as commission; however, it does not specifically address the avoidance of commission in the event of a direct sale by the owner. Thus, the Exclusive Right to Sell Contract is the most appropriate choice to protect Broker Ben's commission.