Regulations Governing the Implementation of Filing Patent Applications and Services by Electronic Means Article 14

The time when the electronic transmission from a user is received at the information system of the Specific Patent Agency shall be the time when such transmission is made to the Specific Patent Agency. However, if the user has received an automatic message indicating successful transmission or payment, the transmission or payment is deemed made despite the fact that the transmission is incomplete in reality.
中文原文 專利電子申請及電子送達實施辦法第14條
使用人向專利專責機關電子傳達之送達時間,以專利專責機關之資訊系統收受之時間為準。
但使用人已取得系統自動回復送件或繳費成功之訊息,實際未完成傳送程序者,視為已送件或已繳費。

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