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 contract between homeowners and brokers that legally establishes how a realtor will find a property buyer on the seller's behalf. This resource provides information about what provisions must be included in the written agreement pursuant to the NAR settlement as well as other provisions. 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. In a breach of contract case, the time period is four years, unless the contract gives a different time period. An offense under this section is a felony of the third degree. Vehicle Information. Apply to Collin College if you are not already a CC student. Try it for free today.