An Illinois Landlord's Five-Day Notice is a written document given by a landlord to their tenant in the State of Illinois to inform them that they have five days to either pay their overdue rent or vacate the property. This document is required by Illinois law when a tenant has failed to pay their rent for at least 10 days. It also serves as a warning that the landlord may take legal action if the rent remains unpaid after the five-day period. There are two types of Illinois Landlord's Five-Day Notice: A Tenant's Notice to Pay Rent or Vacate and a Tenant's Notice to Vacate. The former gives tenants the option to pay their overdue rent or vacate the premises, while the latter is only used when the tenant must vacate the property and the landlord does not wish to accept any late payments.