56 Ill. Adm. Code 280.220
Confidentiality
Section 280.220 Confidentiality
Where a complainant requests confidentiality, the Department
will advise the complainant of the need to reveal the complainant's identity so
that the Department can conduct its investigation. In such cases, the
Department will allow the complainant an opportunity to withdraw the complaint
pursuant to Section 280.300 before notification of the complainant's identity
is given to a respondent.