Enforcement Rules of the Act Governing the Administration of Professional Engineering Consulting Firms Article 9

Where the registration certificate for professional engineering consulting firm is missing, the firm shall apply for reissue of the certificate by filling out the application form, stating the causes of missing and submitting it to the competent authority. If the missing certificate is found, the firm shall surrender promptly the found certificate to the competent authority for nullification.Where the registration certificate for professional engineering consulting firm is damaged, the firm shall fill out the application form and submit it along with the damaged certificate to the competent authority for replacement.
中文原文 工程技術顧問公司管理條例施行細則第9條
工程技術顧問公司登記證遺失者,應填具申請書,敘明遺失原因,向主管機關申請補發;其失而復得者,應即向主管機關繳銷原登記證。
工程技術顧問公司登記證毀損者,得填具申請書,檢具原登記證,向主管機關申請換發。

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