Can a F4 Visa Work in the USA?

Yes, but only after the applicant becomes a Green Card holder. The F4 visa is a family-based immigration category for siblings of U.S. citizens. When an individual enters the U.S. on an F4 visa, they apply for permanent residency (Green Card). Once they officially receive their Green Card, they can legally work in the United States without any additional permits. However, before obtaining the Green Card, they are not authorised to work.