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No signature required, just drop into the mail box, with tracking number.
只是投进邮箱，不需收件人签收，有追查号码。
youdao
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Provide tracking no. & confirm with receiver after shipment.
提供相关运单并与供应商确认是否收到货物。
youdao
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Provide tracking no. & confirm with receiver after shipment.
提供相关运单并与供应商确认是否收到货物。
youdao