A For Sale By Owner contract Utah must include: 1. The Purchase Price, 2.Utah requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. Real Estate Purchase Contract, Addendum, Lead Paint, Sellers Disclosures. The first step is getting people interested in your house. There are a variety of free and paid resources available to help others find your home. This is a legally binding Real Estate Purchase Contract ("REPC"). Utah law requires real estate licensees to use this form. This FSBO paperwork is needed as soon as you accept an offer, so it's useful to have a purchase agreement onhand that you can fill out quickly.