Postal Act Article 6-1
Business operators engaged in the sending, receiving and delivering of correspondence mails should indicate their name , trademarks or other identifiable signs on the cover of the correspondence mails. This is not required in the event that no addressee name and address are provided.
中文原文 郵政法第6-1條
函件收寄或投遞業者應於函件封面上標示其名稱、商標或其他足資識別之符號。
但無收件人名址之函件，得免予標示。
但無收件人名址之函件，得免予標示。