This agreement also sets out the terms of the commission received by the broker if you buy a property during the term of the contract. The listing agreement is the document that gives the listing broker permission to put your home up for sale. The important parts of the listing agreement are: As a customer, you can be a home buyer or a home seller. Representation agreements take the form of a listing agreement or a buyer representation agreement. In a client relationship (as a home buyer or home seller), the broker must protect the client`s interests and not disclose confidential information. It`s biggie! The purchase and sale contract is the real contract for you to buy a house! In Ontario, a real estate transaction must be in writing to be legal, so it is the most important legal document that defines the terms of your offer to purchase.