Warranty Fulfillment: Why Replacement Parts Shipments Trigger New Compliance Cycles

售后保修：备件发运为何触发新一轮合规周期

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The warranty replacement shipment required fresh HS classification—not the original order’s code—because spare parts fall under separate tariff headings with distinct duty rates and quotas.
We discovered that ‘identical’ replacement PCBs needed new RoHS certificates, as the original batch’s test report expired 14 days before dispatch.

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