The Orange County MLS only accepts Exclusive Right to Sell or Exclusive Agency Listing Agreements. This is a basic listing agreement or contract if you will uh between you the agent and the seller the homeowner.Want to get started with the easiest way to capture, nurture and close real estate transactions? 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 legally binding contract between a homeowner and the real estate agent or broker who will be listing the property for sale. Below you will find a list of applications for joining the Orange County REALTORS®, subscribing to the California Regional Multiple Listing Service (CRMLS) Buyer's will need to sign a contract with their agents, and sellers will need to sign an updated listing agreement. We have agreed to require MLS participants working with buyers to enter into written agreements with their buyers before touring a home.