The False Claims
Act can be enforced by private citizens, usually called
whistleblowers by the public, using the special parts of the Act,
known as the qui tam provisions. These
special False Claims Act qui tam whistleblowers are a lot like
"plaintiffs" in other civil lawsuits. However, these
whistleblowers bringing False Claims cases are not referred to as
plaintiffs, but are termed, in
legal terms, “relators.”
The False Claims Act can also be
independently enforced by the United States Department of Justice,
without resort to the qui tam provisions and without a
whistleblower.