A listing agreement is a contract between homeowners and brokers that legally establishes how a realtor will find a property buyer on the seller's behalf. I am a sales agent and am not sure how to fill out the listing agreement form.Seller appoints Broker as Seller's sole and exclusive real estate agent and grants to Broker the exclusive right to sell the Property. 2. A listing agreement is a legally binding contract between a homeowner and the real estate agent or broker who will be listing the property for sale. A listing agreement is a legally binding contract between a homeowner and the real estate agent or broker who will be listing the property for sale. A listing agreement is a contract between a real estate agent or broker (the industry professional who will be listing the property for sale) and a home seller. Moreover, we will handle all negotiations with the buyer's agent in Bexarcounty, Texas until we reach a favorable agreement for both parties. A Texas real estate listing agreement is a contract that outlines the arrangement between a real estate agent and a property seller. Advise Broker of any tenants moving in or out of the Property;.