Listing and Buyer Employment Agreements. Written in clear and unambiguous language.Does a Listing Broker need to sign a new ER-Residential Listing Contract with a seller once the new practice changes take effect? Which Listing Agreement should I use? A2. Its important to check with your Designated Broker for guidance. Q3. All documents concerning a late proposal shall be retained in the procurement file. Neither the listing agreement nor the printout is a part of the purchase contract between the buyer and seller. The information in the MLS. Prepare to put valuable items in a safe or bank box, such as jewelry or important documents. Which Listing Agreement should I use?