Buyers now have to have a written agreement with their agents, which should spell out how their agents get paid. 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. A buyer agreement is a contract between the home buyer and the real estate agent representing them, and it defines how you'll work together. 1. Under the terms of an exclusive agency listing the owner may sell the property and not owe a commission to the listing broker. Rental Homes for Sale: Rental units may be on the market for sale. A citizen of a foreign country who wishes to work in the United States must first get the right visa. However, in the future, if you file an income tax return, you will need to renew your ITIN at that time. The ITIN is for federal tax purposes only.