From The Orlando Sentinel: Genetic privacy: Who is testing your DNA?

Test Infidelity is just one of dozens of U.S. companies offering to test DNA taken without the knowledge of the people concerned. Many firms advertise infidelity testing services or offer “discreet” paternity tests. These allow a man to determine whether he is the father of a child without letting anyone else know what he is up to, or a woman to tell whether a man is the father of her child without involving him in the process.

While the total number of stealthy DNA tests being conducted is unclear, interviews with genetic testing companies indicate that thousands are being run each year in the United States alone.