The Texas Real Estate Commission (TREC) provides standardized contract forms for residential sales. A For Sale By Owner contract Texas must include: 1.The Purchase Price, 2. Texas requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. Some examples of documents you may need to sell your home are: Property survey: This is a legal document that shows the buyer the boundaries of your property. Prepare your house for sale. Find the required and recommended documents for selling your home without a realtor in Texas, plus where to get paperwork help.