When you want to define the terms of a working relationship between two or more parties, consider writing a letter of agreement. 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. This Agreement made, entered into, and first effective this 16th day of September. The notice to vacate must be in writing and should be unconditional, i.e. If there are several recipients, be sure to include the relevant information and leave space for a signature for each person. 4. Two are located in the south portion of Vacaville. Rent Reminder Letter.