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. Here's what to know about FSBO sales in the Bay State. 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. Massachusetts requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. Selling a house without a real estate agent in Massachusetts demands thorough preparation, market knowledge, and negotiation skills. A For Sale By Owner contract Massachusetts must include: 1. The Purchase Price, 2.