A driver's license issued in California works in Texas because Article IV of the Constitution requires states to respect each other's official records and court decisions. The Supreme Court applied this in March 2016's V.L. v. E.L., forcing Alabama to recognize a Georgia court's 2007 adoption decree for a same-sex couple even though Alabama opposed same-sex adoption. Congress invoked Full Faith and Credit in 2022's Respect for Marriage Act, requiring states to recognize same-sex marriages performed elsewhere after the Supreme Court's Obergefell decision. The clause covers public acts, records, and judicial proceedings, meaning courts can't ignore sister states' judgments and states can't void each other's driver's licenses, professional licenses, or final court orders, though some exceptions exist for laws that violate the recognizing state's public policy.