Administrative Procedure Act Article 76

The process server may prepare a certificate of service as may be necessary for the purpose of proof, and specify therein the following particulars and affix thereon his signature:1. The authority ordering the service to be made;2. The person to be served upon;3. The title of the document for service;4. The place where and the date and time when service was made; and5. The manner in which service was executed.With the exception of service effected by electronic transmission, the certificate of service shall be signed by or affixed with the seal of the person accepting the service; if the person refuses or is unable to sign or affix his seal thereon, the process server shall have such facts noted down in the certificate. The certificate of service shall be presented to the administrative authority for the file.
中文原文 行政程序法第76條
送達人因證明之必要,得製作送達證書,記載下列事項並簽名︰一、交送達之機關。
二、應受送達人。
三、應送達文書之名稱。
四、送達處所、日期及時間。
五、送達方法。
除電子傳達方式之送達外,送達證書應由收領人簽名或蓋章;如拒絕或不能簽名或蓋章者,送達人應記明其事由。
送達證書,應提出於行政機關附卷。

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