客人在9月中旬下單，昨天說要換貨，想回他信息，卻發送失敗：”We were unable to send some of the messages below to your customers because emails to their email addresses were bounced by their email service providers.”
看了下tracking，說包裹未妥投：”Notice Left (No Secure Location Available)”（1個月前）；無人認領，超過時間：”Unclaimed/Max Hold Time Expired”，然后快遞就退給我了。
接下來要怎樣？要收restocking fee么？