How to write a basic real estate offer in Massachusetts with ZipForms. This is a legally binding Real Estate Purchase Contract ("REPC").Utah law requires real estate licensees to use this form. Our State-By-State Guide To Real Estate Forms will prepare you for exactly what you need, whether you live in Alabama or Wyoming. We write your offer on state approved forms, and we prepare these forms for you to sign, based on your instructions and our guidance. To help you prepare the paperwork for selling a house without a realtor, here is a list of 12 musthave documents. Purchase and Sale Agreement. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Once a buyer shows interest in a residence for sale, they will submit an offer in the form of this agreement. Send utah real estate purchase contract via email, link, or fax.