Entering the United States under the Visa Waiver Program (VWP) – What happens at the port of entry?
Detailed information about admissions and entry to the United States under the Visa Waiver Program can be found on the DHS Customs Border Protection website at Visa Waiver Program and Admission to the United States. VWP travelers are enrolled in the DHS US-VISIT program when they arrive at U.S. ports of entry. Travelers should be aware that by requesting admission under the Visa Waiver Program, they are generally waiving their right to review or appeal a CBP officer’s decision as to their application for admission at the port of entry.