Enforcement Rules of the Customs Act Article 57

For the residuary from selling imported goods under Article 73, Paragraph 2, and Article 74, Paragraph 2, of the Act, Customs shall notify the duty-payer to withdraw and notify the owner of the transport business with copies initiatively, or at the request of the duty-payer to refund the residuary.In claiming refund or receiving the residuary from the sale of imported goods, the claimant shall present the bill of lading endorsed by the owner of the transport business. Where the imported goods are subject to trade control, the relevant documents shall also be submitted to Customs for inspection.The 5-year period for claiming refunds or receiving the residuary shall commence from the day following the date on which a late fee has been imposed for 20 days in case that the imported goods have not been declared to Customs, or from the day after 30 days following the expiry date of duty memo in case that the Customs duty have not been paid.
中文原文 關稅法施行細則第57條
依本法第七十三條第二項及第七十四條第二項變賣貨物之餘款,由海關通知納稅義務人具領,並副知有關運輸工具所屬業者,或由納稅義務人申請發還。
申請發還或具領變賣貨物餘款時,應繳驗裝運該貨進口之運輸工具所屬業者背書之提貨單,其係管制進口貨品,並應繳驗其他有關證件。
申請發還或具領變賣貨物餘款之五年期限,逾期不報關貨物,自滯報費徵滿二十日之翌日起計算;逾期不繳稅貨物,自繳稅期限屆滿三十日之翌日起計算。

English translation for reference only; the Chinese text prevails. Not legal advice.