FSBO Process Forms Resources Videos Need a bit more help? This is a legally binding Real Estate Purchase Contract ("REPC").Utah law requires real estate licensees to use this form. Flat Fee MLS Listing Salt Lake City Utah. To help you prepare the paperwork for selling a house without a realtor, here is a list of 12 musthave documents. Utah requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. Below is a list of common questions and answers related to For Sale By Owner transactions. For information about our Flat Fee FSBO services, click here. A For Sale By Owner contract Utah must include: 1.