Listing and Buyer Employment Agreements. Written in clear and unambiguous language.An authorized representative from the original listing firm, whether it is a corporate officer or a new broker for the firm should be the first person to sign. The short answer is no. Once the Listing Agreement is filled out completely, the next step is to make sure that all additional forms are included. An exclusive right of sale listing agreement is an agreement between a property owner and real estate broker that gives the broker the sole rights to sell.