We are often asked to compare the Customs Release (CBP Form ) vs the Customs Entry (CBP Form ). Here’s a quick breakdown to help clarify. . There are two major forms when submitting a customs entry: the Customs Entry ( CBP Form ) and the Customs Release (CBP Form ). Bureau of Customs and Border Protection. ENTRY IMMEDIATE CUSTOMS EXAMINATION REQUIRED. ENTRY CBP Form (0189). PAPERWORK.