65 ILCS 5/9-2-91

In counties having a population of less than 1,000,000, a list of all lots, parcels of land, and property withdrawn from collection at the sale by the corporate authorities levying the tax and a list of all lots, parcels of land, and property charged with delinquent special assessments which were forfeited to the State at that sale, shall be returned by the county clerk to the office of the municipal collector, where payment of any delinquent special assessment so withdrawn from collection or forfeited to the State may be made, as in the case of redemption from sale, at any time thereafter, unless and until again advertised and offered for sale and sold for the non-payment thereof.