As a FSBO seller, you'll need to use the appropriate contract, typically the One to Four Family Residential Contract (Resale). 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.Curious about the paperwork for selling a house without a Realtor? It's possible to sell without a real estate agent, but it's complicated. Here's what you'll need to know to do it in Texas. Contact a local title agency. Find the required and recommended documents for selling your home without a realtor in Texas, plus where to get paperwork help. A For Sale By Owner contract Texas must include: 1. The Purchase Price, 2. While buying and selling agents can be a good option, you may be surprised to learn that a real estate attorney might actually be the best option.