The Tenant Agency Contract (Form TAC) is the exclusive agency contract for tenants' agents. PAR's Buyer Agency Contract includes all of the legallyrequired language and allows for a buyer's broker fee to be structured in several ways.This is a legally binding contract, if not fully understood seek competent legal advice before signing. Explore what an exclusive agency agreement is, its legally binding nature, and when to use one. Discover the risks, and stay on top with our free template. You pay a commission to the agent you signed up with. Auction agency agreement. An exclusive listing agreement may comprise one of the following: (1) The exclusive agency of the broker.