A One Time Showing Agreement is a commission agreement signed between a broker representing a buyer and a home owner. 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.GCAAR MEMBERS ONLY – Download all the contracts, disclosures, and forms you will need for a real estate transaction in Montgomery County, MD. Before even showing a home buyers must enter into a buyer broker agreement. It fully outlines the duty's that a broker will do for you. The agent will require you to sign a "listing agreement. " This is a contract describing what the agent is supposed to do and what you must do. Seller agrees that the Broker will show the property located at. To the prospective buyer . We've made updates to all our forms, with a focus on ease of use for REALTORS® and consumers alike.