The Fraud Detection and National Security (FDNS) Directorate created and implemented the Administrative Site Visit and Verification Program (ASVVP) in July 2009 as part of its ongoing enhancement to the integrity of the immigration benefit process. Under the ASVVP, FDNS conducts unannounced pre- and post-adjudication site inspections to verify information contained in certain visa petitions. USCIS provides petitioners and their representatives of record (if any) an opportunity to review and address the information before denying or revoking an approved petition based on information obtained during a site inspection.