Administrative Litigation Act Article 70
Where the parties or agents fail to appoint an agent of service in accordance with the preceding Article, the administrative court may effectuate the service of process by delegating a post office to dispatch the paper to be served by a registered mail.
中文原文 行政訴訟法第70條
當事人或代理人未依前條規定指定送達代收人者，行政法院得將應送達之文書交付郵務機構以掛號發送。