U.S. Citizenship and Immigration Services (USCIS) began its Administrative Site Visit and Verification Program in 2009. Under the program, site visits are conducted by its Fraud Detection and National Security Directorate (FDNS).  FDNS conducts site visits for religious worker (R-1) petitions, H-1B petitions, and, since 2014, L-1 petitions.

An employer that signs Form I-129 agrees that “any supporting evidence submitted may be verified by USCIS through any means determined appropriate by USCIS, including but not limited to, on-site compliance reviews.” FDNS site visits are voluntary, but it is strongly recommended that employers cooperate should one occur. Employers should also be advised to contact their immigration attorney immediately should an FDNS investigation take place. Though most site visits are unannounced, and FDNS will not reschedule a visit to accommodate counsel, counsel is permitted to be present if logistically possible and might be permitted to participate via telephone.