Passport Act Article 27

In the event that the Competent Authority or Overseas Mission makes a decision in accordance with Articles 22 to 25, such decision shall be made in writing, except for decisions related to circumstances described in Subparagraphs 3, 5, and 6 of Paragraph 2 of Article 25.
中文原文 護照條例第27條
主管機關或駐外館處依第二十二條至第二十五條規定為處分時,除有第二十五條第二項第三款、第五款或第六款規定情形外,應以書面為之。

English translation for reference only; the Chinese text prevails. Not legal advice.