The EEOC has reported that it receives more charges of retaliation than any other type of employment discrimination charge, and that there are thousands of cases involving allegations of illegal retaliation filed every year. Retaliation is often prohibited by statute, but the Supreme Court has expanded the scope of actionable retaliation lately, holding that there was a cause of action for retaliation even though the statute in question did not expressly cover the situation at issue.
The Fair Labor Standards Act (FLSA) prohibits discrimination against an employee “because such employee has filed any complaint” under the Act. In Kasten v. Saint Gobain Performance Plastics Corp. (PDF), 563 U.S. ___ (2011), the U.S. Supreme Court held that, although there can be no retaliation if the employer is not on fair notice of the initial complaint, a complaint need not necessarily be in writing to trigger protection under the Act.