I am a sales agent and am not sure how to fill out the listing agreement form. No its not required.Explanation of paragraphs 3, 4 and 5 of the Texas Association of Realtors "Listing Agreement" 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. Detail on Listings Filed with the MLS. It's in the listing agreement in my market. Your original listing agreement or contract is like a roadmap for your homeselling journey. It lays out the rules of the game, so to speak. The listing agent wants her marketing expenses to be paid. No showings, no interest came from the marketing for 8 months.