When you want to define the terms of a working relationship between two or more parties, consider writing a letter of agreement. Erite out what your goals are for the agreement.Establish terms of a working relationship. This Agreement and any attached and signed addenda constitute the entire agreement between the parties and no oral statements will be binding. Create a Letter of Agreement (LOA) using our free DIY printable template. Remind someone of their legal duties to you before initiating legal proceedings. A. During and at the completion of the Residency Period, Sponsor agrees to: 1. Provide its professional services as administrator of the this program,. 2. The New York State Unified Court System offers free instruction booklets and forms for people starting a divorce.