Trust But Verify Act or the PIN Act - Prohibits an American Health Benefit Exchange (established under the Patient Protection and Affordable Care Act) from offering health insurance coverage through the Exchange until the Comptroller General (GAO) certifies to Congress that the Department of Health and Human Services (HHS), and any related federal agencies involved in the administration of such Exchanges, have implemented all appropriate actions necessary to safeguard the personal health and financial information of enrollees and to protect against fraud and abuse.