The unsettled amount at customs refers to the amount of customs duties, value-added tax and other related fees that have not yet been settled after the imported goods pass through customs. After the customs has processed the goods, it will issue a list, which will show the amount of relevant fees that have not yet been settled. These fees need to be settled by the importer or its agent within a certain period of time. Failure to settle these charges on time may be considered past due and may result in some legal issues.