Ukubanjwa ngokwezifiso kuwukuboshwa okuphoqelelwa yi-US Customs Service ukuze kuqinisekiswe ukuthi ukuthunyelwa okungeniswa e-US kuthobelana nemithetho efanele yokuthumela nezivumelwano zamazwe ngamazwe.
Besebenzisa uhlelo lokukhomba, abahloli beCustoms and Border Protection (CBP) banikeza ukuthunyelwa ngakunye amaphuzu. Uma umphumela udlula amamaki athile, ukubukezwa okwengeziwe futhi ngezinye izikhathi ukuhlolwa kuyadingeka. I-CPB iqoqa idatha mayelana nokuthunyelwa okuvela emithonjeni embalwa, okuhlanganisa i-Automated Manifest System (AMS) kanye Nokugcwalisa Okuphoqelekile Kokuvikeleka Kokungeniswa Kwamanye Amazwe (ISF) ukuze kuthuthwe olwandle.
Ngokuya ngedatha kanye nemiphumela, i-CBP ingase ibambe iqhaza ekuthunyelweni ukuze kwenziwe ezinye izenzo. Izinhlobo ezi-5 ezihlukene zempahla ebanjwa abangenisa impahla ngaphandle abangahlangabezana nazo ngenkathi bengenisa izimpahla e-US iManifest Hold, Commercial Enforcement Hold, Statistical Validation Hold, CET Hold (A-TCET), kanye nePGA Hold.