Illegal discrimination occurs when an employer treats an employee differently, or even less favorably, for illegal reasons. Those illegal reasons include: unfair treatment and harassment based on membership of a ‘protected class,’ denial of a reasonable workplace change requested because of religion or disability, improper questions about medical information, or any retaliation against an employee for exercising their rights in the workplace (e.g. submitting a harassment claim, reporting fraudulent activity, participating in an investigation, etc.).