Background checks?  The Chicago ladies do not moonlight as private investigators.  They are probably not going to try to verify your information as this is what prescreening services, such as RS2k, Preferred411 or Datecheck does.  These organizations are in business for just this reason.  They posseess the skill and resources to do the background check you refer to.

As a new addition to this board and apparently a new hobbyist, you need to understand that you do not dictate how a lady chooses to screen.  If you read and become familiar with the newbie board, you will see that common wisdom is to point new hobbyists to prescreening services.  Even if you manage to find someone on backpaage, who is relatively new and whose screening is lax in the hopes of using her as a reference,  chances are that an established lady will only accept a reference from an equally established provider.

This is Chicago and screening is tough for a reason.  You may wish to rethink your strategy IMHO.