Regulations Governing the Use of Uniform Invoices Article 24-1

In the event of a computer or a machine failure causing inability to issue cash register uniform invoices or electronic uniform invoices, business entities shall issue the invoice as required manually and shall make a remark of the matter on the breakdown statement.
中文原文 統一發票使用辦法第24-1條
營業人遇有機器故障,致不能開立收銀機統一發票或電子發票時,應以人工依照規定開立,並於填報明細表時註明。

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