Once all the documents are collected, the import regulations reviewed, and the freight arrived in the US, Customs Gurus transmits your entry electronically to CBP for clearance. This will result in a Customs form 3461 (cargo release) and 7501 (entry summary) being prepared. Your shipment will either be given the green light so you can collect your freight, or CBP may request further information, possibly even an exam. The entry process is complete when duty is paid.