The Illinois Complaint In Eviction is a legal document filed by a landlord or property manager in order to initiate the eviction process in the state of Illinois. This document is used when the tenant has allegedly failed to pay rent or breached the lease agreement in some other way. The Illinois Complaint In Eviction must be filed with the court in the county where the property is located and served upon the tenant by a process server or sheriff. The complaint contains information about the landlord, the tenant, the rental property, and the reasons why the tenant is being evicted. There are two types of Illinois Complaint In Eviction: non-payment of rent and breach of lease. The non-payment of rent complaint is used when a tenant has not paid rent on time or has failed to pay rent altogether. The breach of lease complaint is used when a tenant has violated the terms of the lease in some way, such as by having unauthorized occupants or pets, or by causing damage to the property.