To get a replacement for a lost refund check, you may write to:
OFFICE OF THE COMPTROLLER - SPRINGFIELD
325 W ADAMS ST
SPRINGFIELD IL 62704
Include your name, address, Social Security number (SSN) or Federal employer identification number(FEIN), check number, and refund amount (if known). If you have additional questions about replacing the check, please call the Comptroller's Office at 1 800-877-8078.