The Owners of Record and the Purchasers agree to enter into a Lease and an Option To Purchase.

@Daniel Mohnkern @Steve Babiak     Since the tax bill is due Sept 1 and according to the tax records they have consistently paid the bill during the 1st week of September, I'm thinking that the mortgage company has already received a bill for the taxes well before now and is already aware of the due date and amount.

My suggestion is like the others: Drive around looking for ugly houses, check the tax records for the mailing address, then start a mailing campaign.

Even if permits were not pulled, I would still be expecting a higher tax assessment due to the increased purchase price recorded from the sale correct?

It needs to be an active business generating income over a period of years.....a track record.  

In your area you should be able to look up the address on tax records and just see if the person you're talking to is the owner or not. 

@Jerry Padilla There have been recorded times in history (90s, GFC) that rents dropped.

(I know the rate is 2.25 above 1 year libor)escrow advances $38,969.82Lender paid expenses $24,555.76Interest $98,845.47Fees and recording and other trustee fees: $1,842.41Total Pay off $816,335.37

Did you get payment records from either the tenant or the seller showing what they paid and if it was on time or not?  

Look in the county records, cookcountyassessor.com and cookcountytreasurer.com to find Parcel Id Numbers or PIN's and look up tax records.