To fix some crowding in her teeth, Taylor Weakley, an environmental scientist in Denver, ordered teeth aligners two years ago from SmileDirectClub, a start-up she had seen advertised on social media.
At $1,850, the products were cheaper than braces, and she did not have to visit an orthodontist to get them.
But when the aligners did not correct Ms. Weakley’s teeth as promised, she asked for a refund. After a lengthy back-and-forth, SmileDirectClub said she would get her money back if she signed a nondisclosure provision as part of a general release form. In September, Ms. Weakley, 25, agreed.