Google recent articles from Chicago Tribune, a UBS study, "AmazonHQ2-Considered", and density growth in the downtown that's only behind Seattle.

. -- Herald Tribune

It will land you a visit to the LTB tribunal, you'll have to pay it back plus a fine.Prepaid rent ahead of time is a different story though.

Here is an excerpt from a friend & newbie "flipper" Beth Franken who is documenting her journey through her rehab/flip for Tribune newspapers, "No doubt I wonder what the heck did I get myself into sometimes.

The Fox "News" coverage of the story is highly sensationalized and leaves out many of the details which lead to the Tribunal's ruling that the landlord was not respecting the reasonable requests of his tenants not to show the flat during prayer times and to allow sufficient notice.  

I start out amicably...they turn me down, so I start a case with the State Tax Tribunal.

@Alex Heifetz I've included the Chicago Tribune neighborhood crime map link below.

If such premises or any part thereof be re-let by the Owner for the unexpired term of said lease, or any part thereof, before presentation of proof of which liquidated damages to any court, commission or tribunal, the amount of rent reserved upon such reletting shall be deemed to be the fair and reasonable rental value for the part or the whole of the premises so re-let during the term of the re-letting.

From the Chicago Tribune: "Internal Revenue Code section 280A covers family rentals.

Also, RTO's are VERY complicated at Tribunal.