What is ‘FDNS’?

FDNS stands for Fraud Detection and National Security, the USCIS directorate dedicated to detecting fraud and addressing national security concerns within immigration processes. It exists to uphold the integrity of the system by verifying that the information submitted in petitions matches reality.

In the context of the H-1B, FDNS activity typically appears in verification actions such as:

• review of the data and documents submitted in the petition;
• administrative site visits to the workplace to confirm the position exists and the employment relationship is genuine;
• contact with the employer or the worker to clarify inconsistencies.

These verifications do not, in themselves, indicate that something is wrong with a case; they are part of routine oversight. Keeping the petition information consistent with the actual employment situation is the best way to get through them without surprises.

Because the procedures and scope of these verifications can change, it is worth consulting official USCIS guidance or a specialist to understand what to expect in your specific case.

About the author

Victoria Harper

Editor-in-Chief

Meet the author

As a journalist and lead editor at Visto n’ Visa, Victoria helps ensure that immigration topics are covered in a clear, trustworthy, and easy-to-understand way. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.