A For Sale By Owner contract Michigan must include: 1. The Purchase Price, 2.Disclaimer: This form is provided as a service of the Michigan Association of REALTORS®. Find the required and recommended documents for selling your home without a realtor in Michigan, plus where to get paperwork help. Michigan requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. A Michigan residential purchase agreement is a contract outlining all the terms and conditions of a residential property sale between the buyer and the seller. 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.