("Broker") beginning (date). Click Here for What is Required in Your Disclosure Packet.Required Listing forms on Zipforms. A listing agreement is a legally binding contract between the seller (you) and the real estate brokerage that helps you sell your home. Free fillable forms: City of Oakland. Non-Federal Agency (CA) Sign up. The buyer must complete Form 593-I, "Real. Estate Withholding Installment Sale Agreement. The buyer must complete Form 593-I, "Real. Estate Withholding Installment Sale Agreement.