MA FSBO Real Estate Forms. Get to know the various forms and pieces of paperwork that you will need to use during your FSBO transaction.Learn how to craft a professional FSBO (For Sale By Owner) contract in Massachusetts with this comprehensive step-by-step guide. Massachusetts requires those selling FSBO to fill out and file many documents and forms. A For Sale By Owner contract Massachusetts must include: 1. The Purchase Price, 2. 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. Selling FSBO requires essential documents, from the original sales contract to the deed. Here's what to know about FSBO sales in the Bay State.