A letter agreement is a written legal document that is made between two parties who want a simple way to make their discussions of a transaction official. A Letter of Intent is a written document that serves as an initial agreement between two parties concerning the terms of a possible purchase or transaction.Here is a Membermanaged Operating Agreement template available in 3 formats. This can be used for a Single-Member LLC or a Multi-Member LLC. Customize any template in minutes with PandaDoc. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Michigan Legal Help has tools to fill many kinds of forms but we do not cover all areas. You may have a blank form that you need to fill out on your own. Each party should get an original signed copy of the contract for their files. An IOU (I Owe You) is a legal document that sets out the details of a loan made between two people, a borrower, and a lender.