IL SB3535

Amends Section 21-310 of the Illinois Property Tax Code to require courts to promptly notify the county collector in writing when declaring a tax sale in error upon application by the owner of the certificate of purchase.

Applies specifically to sales declared in error under subsection (b) grounds, including bankruptcy filings, substantially destroyed improvements, federal interests in property, and hazardous substance conditions.

Adds a new requirement that the written notification to the county collector must occur promptly after the court's declaration of a sale in error.

Maintains existing procedures for administrative declarations of sales in error by the county collector, including the 28-day objection period for certificate holders before administrative finalization.