Company Act Article 19

I.A company may not conduct its business operations or commit any juristic act in the name of its company, unless it has completed the procedure for company incorporation registration.II.The person who has violated the provision set out in the preceding Paragraph shall be punished with imprisonment for a period of not more than one year, detention, or in lieu thereof or in addition thereto a fine of not more than NT$ 150,000 and shall assume on his own the civil liabilities arising there-from, or shall be jointly and severally liable therefore, in case there are two or more violators. In addition, the company shall be enjoined from using its corporate name for doing its business.
中文原文 公司法第19條
未經設立登記,不得以公司名義經營業務或為其他法律行為。
違反前項規定者,行為人處一年以下有期徒刑、拘役或科或併科新臺幣十五萬元以下罰金,並自負民事責任;行為人有二人以上者,連帶負民事責任,並由主管機關禁止其使用公司名稱。

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