A notice to a residential tenant when a landlord sells a Cook County, Illinois, single-family or multiple-dwelling-unit property. This notice informs the residential tenant of the change in ownership, the assignment of the lease, and the transfer of the security deposit to the purchaser in compliance with Illinois law and the Cook County Residential Tenant and Landlord Ordinance. This Standard Document has integrated notes with important explanations and drafting and negotiating tips for both sellers and purchasers.