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. INTRODUCTION: These guidelines are provided to assist an agent who is completing the Exclusive Right to Sell Listing.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. (ii) 24 months after the consummation of the IPO in the event that either a letter of intent, an agreement in principle or a definitive agreement to complete a.