- The marriage of the employee.
- The pregnancy of the employee (or the birth of her child).
- The employee’s unfitness due to an illness or injury.
- The employee’s military service.
- The employee’s decision to file an employment claim under an anti-discrimination law, such as the ADA, the ADEA or Title VII of the Civil Rights Act.
- The employee’s exercise of free speech or political speech.
- The employee’s whistleblowing on co-workers, managers, or the company itself.
- The employee’s filing of a worker’s compensation claim.
- The exercise of any rights under a collective bargaining agreement.
- The wearing of any clothing or adornments that may be considered religious in nature.
- The employee’s filing of any complaints with government agencies.
- The employee’s agreement to cooperate with government investigators or regulators.
- The employee’s filing of any private lawsuits.
- Jury duty.
- Wage garnisheeing to pay the employee’s child support obligations or other judgments owed by the employee.
- The employee’s refusal to take a lie detector test.
- The employee’s participation in, or organization of, a labor union.