Enforcement Rules of the Labor Insurance Act Article 37

When employers or persons in charge of the insured units deduct insurance premiums payable by the insured persons pursuant to Subparagraph 1 of Paragraph 1 of Article 16 of the Act, they shall explain them clearly on the insured persons' wage bills (bags) or issue receipts to them.
中文原文 勞工保險條例施行細則第37條
各投保單位之雇主或負責人,依本條例第十六條第一項第一款規定扣繳被保險人負擔之保險費時,應註明於被保險人薪資單(袋)上或掣發收據。

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