A quick overview of the Massachusetts Association of Realtors exclusive right to sell listing agreement. The contract outlines each party's rights and obligations regarding a real estate transaction.A Massachusetts real estate listing agreement is a legal document through which a real estate agent is assigned to listing a purchasable residential property. Often brokers present sellers with a standard listing agreement (an agreement which contains "standard language"). This listing agreement form is for listing a property for rent. To list a property for sale, use the MLS Listing Agreement - Property for Sale form. Once you have selected a listing broker for your home, you will be shown a listing agreement. Addendum to Real Estate Purchase Contract. 421. Addendum to Residential Tenancy Agreement. 300. You and your Realtor will likely review this contract in detail and fill it out together.