Fraud Crime Hazard Prevention Act Article 22

During the period providing prepaid card services to non-Taiwanese users, telecom businesses shall check whether such users leave the country or overstay by connecting to the database specified in paragraph 1 of Article 19.If it is discover that users have left the country or overstayed based on the inquiries in accordance with the preceding paragraph, telecom businesses shall restrict or suspend their prepaid card services.If non-Taiwanese users mentioned in the preceding paragraph re-enter during the valid period of prepaid card services, after applying for the verification and registration of users’ identity with telecom businesses, telecom businesses may continue to provide the initial telecom services.
中文原文 詐欺犯罪危害防制條例第22條
電信事業提供非本國籍用戶預付卡服務期間,應介接第十九條第一項之資料庫定期查詢該用戶是否出境、逾期停留或居留。
電信事業經依前項規定查詢非本國籍用戶已出境、逾期停留或居留,應限制或停止提供其預付卡服務。
前項非本國籍用戶於預付卡服務有效期間再次入境,經向電信事業申請核對及登錄用戶身分後,電信事業得繼續提供原電信服務。

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