(35 ILCS 200/21-185)

Sec. 21-185. Cure of error or informality in assessment rolls or tax list or in the assessment, levy or collection of the taxes. No assessment of property or charge for any of the taxes shall be considered illegal on account of any irregularity in the tax lists or assessment rolls, or on account of the assessment rolls or tax lists not having been made, completed or returned within the time required by law, or on account of the property having been charged or listed in the assessment or tax list without name, or in any other name than that of the rightful owner. No error or informality in the proceedings of any of the officers connected with the assessment, levying or collection of the taxes, not affecting the substantial justice of the tax itself, shall vitiate or in any manner affect the tax or the assessment thereof. Any irregularity or informality in the assessment rolls or tax lists, or in any of the proceedings connected with the assessment or levy of the taxes, or any omission or defective act of any other officer or officers connected with the assessment or levying of the taxes, may be, in the discretion of the court, corrected, supplied and made to conform to law by the court, or by the person (in the presence of the court) from whose neglect or default it was occasioned. Where separate advertisement and application for judgment and order of sale is made on account of delinquent special taxes or special assessments in all cities, villages and incorporated towns in counties with 3,000,000 or more inhabitants, and in cities, villages and incorporated towns in other counties in which the county board by resolution has extended the time in which the return, required in Section 20-100, may be made, the procedure shall, in all respects, be the same as in this section prescribed, except that there shall be 2 separate judgments and orders for sale, one on account of delinquent special taxes and special assessments and the other on account of delinquent general taxes.

(Source: P.A. 84-1275; 88-455.)

(35 ILCS 200/Art. 21 Div. 4 heading) Division 4. Annual tax sale procedure

(35 ILCS 200/21-190)

Sec. 21-190. Entry of judgment for sale. If judgment is rendered against any property for any tax or, in counties with 3,000,000 or more inhabitants, for any tax or special assessment, the county collector shall, after publishing a notice for sale in compliance with the requirements of Sections 21-110 and 21-115 or 21-120, proceed to offer the property for sale pursuant to the judgment. However, in the case of an appeal from the judgment, if the party, when filing notice of appeal deposits with the county collector the amount of the judgment and costs, the collector shall not sell the property until the appeal is disposed of.

(Source: P.A. 79-451; 88-455.)

(35 ILCS 200/21-195)

Sec. 21-195. Examination of record; certificate of correctness. On the day advertised for sale, the county clerk, assisted by the collector, shall examine the list upon which judgment has been entered and ascertain that all payments have been properly noted thereon. The county clerk shall make a certificate to be entered on the record, following the order of court that the record is correct, and that judgment was entered upon the property therein mentioned for the taxes, interest and costs due thereon. The certificate shall be attested by the circuit court clerk under seal of the court and shall be the process on which the property or any interest therein shall be sold for taxes, special assessments, interest and costs due thereon, and may be substantially in the following form:

State of Illinois County of .....

I, ...., clerk of the circuit court, in and for the county of ...., do hereby certify that the foregoing is a true and correct record of the delinquent property in the county, against which judgment and order of sale was duly entered in the circuit court for the county, on (insert date), for the amount of the taxes, special assessments, interest and costs due severally thereon as therein set forth, and that the judgment and order of court in relation thereto fully appears on the record.

Dated (insert date).

(Source: P.A. 91-357, eff. 7-29-99.)

(35 ILCS 200/21-200)

Sec. 21-200. County clerk assistance at sale. The county clerk, in person or by deputy, shall attend all sales for taxes, made by the collector, and shall assist at the sales.

(Source: Laws 1939, p. 886; P.A. 88-455.)

(35 ILCS 200/21-205)

Sec. 21-205. Tax sale procedures.

(a) The collector, in person or by deputy, shall attend, on the day and in the place specified in the notice for the sale of property for taxes, and shall, between 9:00 a.m. and 4:00 p.m., or later at the collector's discretion, proceed to offer for sale, separately and in consecutive order, all property in the list on which the taxes, special assessments, interest or costs have not been paid. However, in any county with 3,000,000 or more inhabitants, the offer for sale shall be made between 8:00 a.m. and 8:00 p.m. The collector's office shall be kept open during all hours in which the sale is in progress. The sale shall be continued from day to day, until all property in the delinquent list has been offered for sale. However, any city, village or incorporated town interested in the collection of any tax or special assessment, may, in default of bidders, withdraw from collection the special assessment levied against any property by the corporate authorities of the city, village or incorporated town. In case of a withdrawal, there shall be no sale of that property on account of the delinquent special assessment thereon.

(b) Until January 1, 2013, in every sale of property pursuant to the provisions of this Code, the collector may employ any automated means that the collector deems appropriate. Beginning on January 1, 2013, either (i) the collector shall employ an automated bidding system that is programmed to accept the lowest redemption price bid by an eligible tax purchaser, subject to the penalty percentage limitation set forth in Section 21-215, or (ii) all tax sales shall be digitally recorded with video and audio. All bidders are required to personally attend the sale and, if automated means are used, all hardware and software used with respect to those automated means must be certified by the Department and re-certified by the Department every 5 years. If the tax sales are digitally recorded and no automated bidding system is used, then the recordings shall be maintained by the collector for a period of at least 3 years from the date of the tax sale. The changes made by this amendatory Act of the 94th General Assembly are declarative of existing law.

(b-5) For any annual tax sale conducted on or after the effective date of this amendatory Act of the 102nd General Assembly, each county collector in a county with 275,000 or more inhabitants shall adopt a single bidder rule sufficient to prohibit a tax purchaser from registering more than one related bidding entity at the tax sale. The corporate authorities in any county with less than 275,000 inhabitants may, by ordinance, allow the county collector of that county to adopt such a single bidder rule. In any county that has adopted a single bidder rule under this subsection (b-5), the county treasurer shall include a representation and warranty form in each registration package attesting to compliance with the single bidder rule, except that the county may, by ordinance, opt out of this representation and warranty form requirement. A single bidder rule under this subsection may be in the following form:

(1) A registered tax buying entity (principal) may only have one registered buyer at the tax sale and may not have a related bidding entity directly or indirectly register as a buyer or participate in the tax sale. A registered tax buying entity may not engage in any multiple bidding strategy for the purpose of having more than one related bidding entity submit bids at the tax sale.

(2) A related bidding entity is defined as any individual, corporation, partnership, joint venture, limited liability company, business organization, or other entity that has a shareholder, partner, principal, officer, general partner, or other person or entity having (i) an ownership interest in a bidding entity in common with any other registered participant in the tax sale or (ii) a common guarantor in connection with a source of financing with any other registered participant in the tax sale. The determination of whether registered entities are related so as to prohibit those entities from submitting duplicate bids in violation of the single bidder rule is at the sole and exclusive discretion of the county treasurer or his or her designated representatives.

(c) County collectors may, when applicable, eject tax bidders who disrupt the tax sale or use illegal bid practices.

(Source: P.A. 102-519, eff. 8-20-21.)

(35 ILCS 200/21-210)

Sec. 21-210. Bids by taxing districts. Any city, incorporated town or village, corporate authorities, commissioners, or persons interested in any special assessment or installment thereof, may become purchaser at any sale, and may designate and appoint some officer or person to attend and bid at the sale on its behalf.

(Source: Laws 1939, p. 886; P.A. 88-455.)

(35 ILCS 200/21-215)

Sec. 21-215. Penalty bids. The person at the sale offering to pay the amount due on each property for the least penalty percentage shall be the purchaser of that property. No bid shall be accepted for a penalty exceeding 9% of the amount of the tax or special assessment on property.

(Source: P.A. 102-363, eff. 1-1-22.)

(35 ILCS 200/21-220)

Sec. 21-220. Letter of credit or bond in counties of 3,000,000 or more; registration in other counties. In counties with 3,000,000 or more inhabitants, no person shall make an offer to pay the amount due on any property and the collector shall not accept or acknowledge an offer from any person who has not deposited with the collector, not less than 10 days prior to making such offer, an irrevocable and unconditional letter of credit or such other unconditional bond payable to the order of the collector in an amount not less than 1.5 times the amount of any tax or special assessment due upon the property, provided that in no event shall the irrevocable and unconditional letter of credit or such other unconditional bond be in an amount less than $1,000. The collector may without notice draw upon the letter of credit or bond in the event payment of the amount due together with interest and costs thereon is not made forthwith by the person purchasing any property. At all times during the sale, any person making an offer or offers to pay the amount or amounts due on any properties shall maintain the letter of credit or bond with the collector in an amount not less than 1.5 times the amount due on the properties which he or she has purchased and for which he or she has not paid.

In counties with less than 3,000,000 inhabitants, unless the county board provides otherwise, no person shall be eligible to bid who did not register with the county collector at least 10 business days prior to the first day of sale authorized under Section 21-115. The registration must be accompanied by a deposit in an amount determined by the county collector, but not to exceed $250 in counties of less than 50,000 inhabitants or $500 in all other counties, which must be applied to the amount due on the properties that the registrant has purchased. If the registrant cannot participate in the tax sale, then he or she may notify the tax collector, no later than 5 business days prior to the sale, of the name of the substitute person who will participate in the sale in the registrant's place, and an additional deposit is not required for any such substitute person. If the registrant does not attend the sale, then the deposit is forfeited to the Tax Sale Automation Fund established under Section 21-245. If the registrant does attend the sale and attempts, but fails, to purchase any parcels offered for sale, then the deposit must be refunded to the registrant.

(Source: P.A. 95-537, eff. 8-28-07.)

(35 ILCS 200/21-225)

Sec. 21-225. Forfeited tax liens and certificates. Every tax lien or certificate for property offered at public sale, and not sold for want of bidders, unless it is released from sale by the withdrawal from collection of a special assessment levied thereon, shall be forfeited to the county, as trustee for the taxing districts, and managed pursuant to Section 21-90. Tax certificates are also forfeited to the county in those circumstances described in subsection (d) of Section 21-310 and subsection (f) of Section 22-40 of this Code.

(Source: P.A. 103-555, eff. 1-1-24.)

(35 ILCS 200/21-230)

Sec. 21-230. Record of sales and redemptions. When any property is sold, the county clerk shall enter on the Tax Judgment, Sale, Redemption and Forfeiture Record, in the blank columns provided for that purpose, the name of the purchaser and the final bid. When any property is redeemed from sale, the county clerk shall enter the name of the person redeeming, the redemption date and the amount of redemption, in the proper column.

(Source: Laws 1965, p. 631; P.A. 88-455.)

(35 ILCS 200/21-235)

Sec. 21-235. Record of forfeitures. All tax liens and certificates forfeited to the county at the sale shall be noted on the Tax Judgment, Sale, Redemption and Forfeiture Record.

In counties with less than 3,000,000 inhabitants, a list of all property charged with delinquent special assessments and forfeited to the county at the sale shall be returned to the collector of the levying municipality.

(Source: P.A. 103-555, eff. 1-1-24.)