Regulations Governing Employment Transfer Procedures and Employment Qualifications for Foreigners Engaging in the Jobs Specified in Subparagraph 8 to 11 of Paragraph 1 of Article 46 of the Employment Service Act Article 12

After completion of foreigners transferring operation, Public Employment Service Agency shall issue a Consecutive Employment Certificate to the employer of consecutive employment and the original employer.
中文原文 外國人受聘僱從事就業服務法第四十六條第一項第八款至第十一款規定工作之轉換雇主或工作程序準則第12條
公立就業服務機構完成外國人轉換作業後,應發給接續聘僱證明書予接續聘僱之雇主及原雇主。

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