Review a sample New York Exclusive Right To Sell Listing Agreement before you sign. 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.A listing agreement is a contract between a property owner and a real estate broker authorizing the broker to represent the seller and find a buyer. This can also be done in the listing agreement. Completing the Contract. The Listing Agreement Language also authorizes the broker to list the property in the MLS and allow the MLS to make IDX listings available to other brokers. By signing the agreement, you permit the agent to find buyers for your property and represent your interest in the deal. I had to leave the real estate office and didn't have time to do the paperwork. -But if the seller finds the buyer without the help of any real estate agent, she doesn't owe your brokerage a commission.