If a deceased person's house is foreclosed and purchased by 3rd party - how do you get possession?

[Stephen D.]

I'm looking at a house that is due to come up at a Sheriff's sale.  The owner is deceased and the mortgage company is foreclosing on the house and knows that the owner is deceased.  In looking through the windows in the house, the house is empty.  No furniture, etc so the owner's relatives probably cleaned up the place.  If I win the auction and get deed to the property, I don't know if there's a point in filing an eviction notice since no one lives there so the question is, do I just wait the 30 days as required by law and have a locksmith change the locks?  House is in Illinois so if anyone has experience with Illinois law, that would be helpful.

Thanks in advance