A Letter of Understanding (LOU) is a formal text that sums up the terms of an undertakings of a contract which may have been negotiated up to this point only in spoken form or otherwise informally. It reviews the terms of an agreement for a service, a project or a deal and is often written as a step before a more detailed contract is issued.

Letter of Understanding (LoU) or Memorandum of Understanding (MoU) is a formal letter that contains text which states an agreement between two parties. This is an official agreement on paper about the negotiation that has been made either verbally or just via an unofficial manner.

A Memorandum of Understanding (MoU), or a Letter of Understanding (LoU) contract, explains an agreement made between two or more parties. It outlines the understanding all sides have regarding a specific situation. Think of it as a formal version of a gentlemen's agreement.

What Is a Letter or Note of Understanding? A letter of understanding is a form of written agreement. It outlines the specifics of an understanding and is often used to detail the terms of a sale. A letter of understanding is usually written before a formal contract is drafted.