To get a paternity test on "The Maury Show", call 1-888-456-2879, text MAURY to 85000 or apply on mauryshow.com. As of November 2015, you can only apply to be a guest in general, and not specifically for the shows featuring paternity tests.
Calling to apply is toll-free, but standard messaging rates may apply when texting your story. To apply online, go to the show's website and click the "Be a Guest" tab. You will find a form at the bottom of the page requesting your name, age, city, state and daytime phone number. There is a box on the right side of the page where you can share your paternity test story. You must also agree to the site's terms and conditions.
As of November 2015, the "Be a Guest" page also features a "Do you have a family mystery that can be solved with a DNA test?" submission link that brings you to a pop-up form similar to the one on the main page. There is also a "Question of the Day" prompt which, if related to paternity tests, could be answered via e-mail to firstname.lastname@example.org, adding a third possible way to apply. Although it is not specifically referenced on the site as a method of application, another option could be writing a letter to "The Maury Show" at 307 Atlantic Street, Stamford, CT, 06901.