Postal Act Article 15
Besides Chunghwa Post, no others may issue or produce vouchers similar to postage stamps with numbers or marks suggesting payment of postage.
中文原文 郵政法第15條
除中華郵政公司外，任何人不得發行、製作與郵票類似，且具有交付郵資證明之票證。
English translation for reference only; the Chinese text prevails. Not legal advice.