Creates the Vacancy Fraud Act. Provides that, on or after January 1, 2024, any owner of real property located in a county with 3,000,000 or more inhabitants may file a written vacancy fraud complaint alleging that: (i) certain real property in that county has received a decrease in assessed value, a decrease in market value, or an abatement of taxes because the property is vacant; and (ii) the owner of that vacant property is not actively attempting to sell or lease the property or actively attempting to alter or modify the property to prepare it for sale or lease. Sets forth factors for determining vacancy fraud. Provides that the owner of the vacant property may be subject to the following penalties: (1) the payment of 3 times the amount of back taxes owed for any vacancy reduction the subject property received for the period in which the subject property received the reduction but was found to have engaged vacancy fraud; and (2) the payment of interest on any back taxes. Effective immediately.