A listing agreement explains the relationship between the home seller and their agent in detail. Here's what you need to look for.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. If the agent has no listing agreement with you, he likely won't show it since you have no obligation to pay him. Under California law, a cancellation of agreement without the signature of the real estate agent or their broker may not be legally binding. Prepaid Rental Listing Services. Apply for PRLS License, Description of Business, Contract Approvals, List of Licensees. Not in a market with Zillow's new selling experience? A listing agreement is a legally binding contract between a seller and a real estate agent or broker. It's free to see how much you can save.