The Missouri notice to quit for non-payment is served on a tenant to demand payment for rent in arrears and inform them that they may be evicted if they fail to pay. Landlords are required to demand payment before initiating a rent and possession action (eviction lawsuit). The demand can be made orally, although it is best to use this written document and obtain the tenant’s signature to provide evidence of the landlord’s request. Missouri law does not define the period in which the tenant has to supply payment. Therefore, if the tenant fails to pay after receiving the notice, the landlord can file an eviction lawsuit immediately.