Before filing a lawsuit in court for wrongful termination, you need to file a complaint with the Illinois Department of Human Rights and the EEOC. Can an employer terminate me without advance notice or without giving a reason or an unfair reason for the termination?The law requires that complaints be filed within 30 days after the alleged retaliatory action. The IDHR is the state agency you might turn to first when building a wrongful termination case in Illinois. You can speak with a member of the Illinois Department of Human Rights (IDHR) and file a charge. You have 300 days from the last incident to file with the IDHR. Filing a Workplace Rights Complaint. If you believe you've experienced wrongful termination, consider filing a claim with the Equal Employment Opportunity Commission (EEOC). The Illinois Department of Human Rights has the responsibility for implementing discrimination laws in this state. You can file a formal job discrimination complaint with the EEOC whenever you believe you are: