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.Step 2: Fill out your disclosure forms. What do I need to sell my house in Texas? Do you have a Cibolo home you are considering selling? Com, Zillow, trulia, Google, Yahoo and many other syndicated realty websites for up to 6 MONTHS!