The 11th U.S. Circuit Court of Appeals on Monday affirmed a $20,000 sanction that a federal judge in Columbus, Ga., levied against Orly Taitz, the California dentist-lawyer who has filed suits across the country challenging the legitimacy of Barack Obama’s presidency, claiming he was born in Kenya.

Shortly after Obama’s inauguration, Taitz propelled herself into the spotlight as the ad-hoc spokeswoman of the “birther” movement, whose adherents have challenged Obama’s American citizenship.