In CA you can request a credit report fee and run a credit report online. My landlord (private house rental) asked for $30 to run a credit report, I preferred to run it myself so I gave him a credit report ran within the last 30 days.
I don't know what IL law is pertaining to credit reporting fees for tenant/landlord, but there are ways to run a credit report. And for all that, e-renter.com just as it was recommended.
Just make the prospective renter pay the fee.