Agency relationships with clients versus Non-Agency relationships with customers

• Agency relationship: Traditionally, the broker provides a conventional full-service, commission-based brokerage relationship under a signed listing agreement with a seller or "buyer representation" agreement with a buyer, thus creating under common law in most states an agency relationship with fiduciary obligations. The seller or buyer is then a client of the broker. Some states also have statutes which define and control the nature of the representation.

Agency relationships in residential real estate transactions involve the legal representation by a real estate broker (on behalf of a real estate company) of the principal, whether that person or persons is a buyer or a seller. The broker (and his/her licensed real estate agents) then becomes the agent of the principal.

• Non-agency relationship: where no written agreement nor fiduciary relationship exists, a real estate broker (and his agents) works with a principal who is then known as the broker’s customer. When a buyer, who has not entered into a Buyer Agency agreement with the broker and buys a property, then that broker functions as the sub-agent of the seller’s broker. When a seller chooses to work with a transaction broker, there is no agency relationship created.