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. A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers.("Broker") and. ("Buyer"). 2. Edit, sign, and share chicago association of realtors exclusive listing agreement form online. Before they can start looking at houses with a broker, buyers will have to sign an agreement about the broker's compensation. Edit, sign, and share chicago association of realtors exclusive listing agreement form online. Term of the agreement (e.g. , one day, one month, one house, one zip code);; Services to be provided (e.g. The signature on the form indicates acknowledgment of this paragraph. The length of your buyerbroker agreement is one of the first things laid out in the contract.