A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. The Real Property Department records documents pertaining to real property or real estate in Harris County.A OneTime Showing Agreement form is a legally binding agreement between the buyer's broker and the homeowner listing the property for sale. A listing agreement is a legally binding contract between the property owner and a real estate agent. What is included in a listing agreement? While the listing agreement, known as an exclusive right to sell, grants to the real estate broker the right to receive a commission regardless of whether the. The Minnesota Association of Realtors supplies realtors with this form to use. They can ask a client for an exclusive contract. No guarantee that a potential client will sign one. 1. Premises. Seller shall sell and convey and Purchaser shall purchase the property, together with all buildings and improvements thereon (collectively the.