A Commission Agreement for Sale is used for one-time showings of real estate so a Realtor can show a home to a prospective buyer and be paid a commission. This resource provides information about what provisions must be included in the written agreement pursuant to the NAR settlement as well as other provisions.("Broker") and. ("Buyer"). 2. A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. Well, the seller's agent is typically the person who draws up a real estate purchase agreement. Curious about the paperwork for selling a house without a Realtor? One Time Showing Agreement to Show Property. Edit, sign, and share chicago association of realtors exclusive listing agreement form online. As amended from time to time, through the facility of the Chicago Association of REALTORS. NAR is widely considered one of the most effective advocacy organizations in the country.