A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. 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 seller (you) and the real estate brokerage that helps you sell your home. Request a fine reduction. For your eligible infraction offense using the new MyCitations tool. This is a step-by-step tutorial on how to fill out a residential purchase agreement. Can a realtor sign a sales contract without a complete listing agreement? A property owner agrees to pay a commission to a real estate broker for a single showing that results in the sale of the property. The Underwood Law Firm is familiar with these disputes and is in the ideal position to assist your dealings with real estate brokers. We also complete one of the largest assessment rolls in the Country each year on time and with an incredible amount of accuracy.