35 ILCS 516/285

Recovery of amount of tax paid by purchaser at erroneous sale. In addition to all other remedies, when the purchaser or assignee of a certificate of purchase that has been declared an erroneous sale, has paid any tax upon the mobile home sold, which was not paid by the owner of the mobile home and was not refunded to the tax purchaser or assignee by the county, the purchaser or assignee may recover from the owner the amount he or she paid, with 10% interest, as money paid for the owner's use.