How To Write A Letter Leaving An Apartment . This should be followed by today’s date and the name and mailing address of your tenant. It is best to write a letter to move out to your landlord. Notice Of Leaving Apartment Said Apartment from said.us My lease expires on [date] and i intend to vacate my apartment by [date]. Address of tenant (this is the apartment being leased) city,state,zip code. Dear name of apartment manager, our lease is ending on date.