The Illinois Month to Month Rental Agreement is for shorter term renters who do not want a fixed length of time held against them under a residential lease. This form allows for either party, landlord or tenant, to be able to terminate the lease with notice of at least thirty (30) days according to Statute 5/9-207. This notice should be sent through Certified Mail with a Return Receipt for legal documentation. It is also a good idea to contact the other party via phone or e-mail to make sure they’ve received the documentation.