A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. All agents must have a Buyer-Broker Agreement (BBA) signed with their buyers, what happens when a buyer refuses to sign?The Minnesota Association of Realtors supplies realtors with this form to use. A OneTime Showing Agreement form is a legally binding agreement between the buyer's broker and the homeowner listing the property for sale. The seller can change the listing agreement whenever he or she wants. Any time frame to sell is whatever you negotiate with the seller. Listing agreements serve as a hiring contract with the agent for the sale of a property, and are only valid for a set amount of time. Either the seller or broker can make a unilateral decision to terminate the listing agreement. Is considered a Facilitator or Transaction Broker until such time as an agency agreement is established. These plans usually exist as a contract between the insider and their broker.