Regulations Governing the Deposit Accounts and Suspicious or Unusual Transactions Article 16

A bank shall establish a mechanism supported by information systems to detect unusual deposit account transactions. It shall also establish early warning indicators focusing on transaction amounts exceeding a certain threshold, transaction amounts clearly inconsistent with average account balances, or frequent use over a short period of electronic transaction functions, and shall assign dedicated personnel to check and follow up at least once per day, and prepare records, which shall be delivered in accordance with internal procedures to the responsible supervisor for review.The records referred to in the preceding paragraph, and data pertaining thereto, shall be maintained for at least five years, and may be provided to the competent authority, relevant units, and internal audit units for review.
中文原文 存款帳戶及其疑似不法或顯屬異常交易管理辦法第16條
銀行應建立以資訊系統輔助清查存款帳戶異常交易之機制,對於交易金額超過一定門檻、交易金額與帳戶平均餘額顯不相當、或短期間內密集使用電子交易功能等狀況,應設立預警指標,每日由專人至少查核及追蹤乙次並作成紀錄,依內部程序送交權責主管核閱。
前項所稱紀錄及其相關資訊,至少應保存五年,並得提供主管機關、有關單位及內部稽核單位調閱。

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