Embora não esteja claro por que você precisaria disso, Requisitos próprios da alfândega e da patrulha de fronteira por quanto tempo você e ele precisam reter esse registro é de 5 anos. Enquanto o seu recibo pode não estar mais nos registros do CBP, você ainda pode fazer uma Solicitação de Liberdade de Informação, apenas no caso.
Requirements for keeping CBP records and entry documents on file
How long are importers, carriers, exporters, travelers and brokers required to keep U.S. Customs and Border Protection records and entry documents on file?
Importers, exporters, carriers, and brokers are required to keep their U.S. Customs and Border Protection (CBP) records and entry documents for five years from date of entry, or five years from the date of the activity that required the maintenance of the records. However, travelers who physically clear CBP by making an oral declaration are not required to maintain supporting documents, as long as they are not declaring commercial merchandise.
For additional information on the requirements for maintaining CBP records, please refer to 19 CFR § 163.4.
What Records can CBP Provide under FOIA?
Records Regarding My Inspection or Examination upon My Arrival at a U.S. Port of Entry
Concerns about how you were treated by CBP officers, or if you have a general or specific question(s) about CBP or your CBP inspection:
CBP Info Center or call (877) CBP-5511 (227-5511) for U.S. Callers or (202) 325-8000 for International callers