IL HB3364

Prohibits employers enrolled in E-Verify or other Employment Eligibility Verification Systems from imposing work authorization verification requirements greater than those required by federal law or the verification system itself

Expands employee protections when employers receive discrepancy notifications from non-immigration enforcement entities (such as the Social Security Administration, IRS, or insurance companies) regarding taxpayer identification numbers or identifying documents, including prohibiting adverse employment actions and requiring notice within 5 business days

Broadens the definition of "employee's authorized representative" to include attorneys or any other representative authorized by the employee in writing, in addition to collective bargaining representatives

Creates new enforcement mechanisms including: civil actions by "interested parties" who can recover 10% of statutory penalties plus attorney's fees; private rights of action for aggrieved employees with penalties of $100-$1,000 per violation (up to $5,000 for repeat violations within 3 years); and a $10,000 civil penalty for violations resulting in loss of employment

Grants the Department of Labor expanded investigative authority including power to inspect employer records related to E-Verify compliance, issue subpoenas, and conduct administrative hearings with cease-and-desist authority