A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. The listing agreement is a contract that lays out specific, agreedupon terms, giving the real estate agent permission to market a home to buyers.A OneTime Showing Agreement form is a legally binding agreement between the buyer's broker and the homeowner listing the property for sale. You must create a Listing File in SkySlope at the time of Listing and upload all listing paperwork for review at the time of listing. This is a legally binding document, if not fully understood, consult legal advice before signing. This agreement is between. A listing agreement is a legally binding contract between the property owner and a real estate agent. This is your first impression, and contains the most important terms of the contract. Tim and Julie Harris are one of the TOP EXP REALTY Sponsors in the world. In the present case the contract gave the "exclusive sale" of the property to the broker, but provided no time for its continuance.