The Texas Real Estate Commission (TREC) provides standardized contract forms for residential sales. Knowing the basic forms needed for an FSBO sale in Texas, such as the purchase contract and earnest money agreement, is essential.Let's dive into some of the FSBO paperwork that will be necessary when legally selling a house without an agent's help. 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. Explore the benefits of FSBO real estate with document support. Confidently navigate the complex paperwork for selling a house without a realtor. A For Sale By Owner contract Texas must include: 1. The Purchase Price, 2.