Regulations Governing the Handling of Mail Article 58
Any undeliverable mail or any mail for which delivery is prohibited by law that cannot be returned to the sender shall be posted for claim for one month. Any mail that is not claimed after one month shall be treated as undelivered mail.If the sender has instructed to abandon or has specified no return service in case of non-delivery, the mail shall be treated as undelivered mail.
中文原文 郵件處理規則第58條
無法投遞或依規定不予寄遞而不能退還寄件人之郵件，應由原寄郵局招領揭示一個月，屆期無人領取者，為無著郵件。
寄件人聲明拋棄或無法投遞免退回者，視為無著郵件。
寄件人聲明拋棄或無法投遞免退回者，視為無著郵件。