Rules Governing the Administration of Electronic Payment Business Article 12
After implementing a payment instruction of a user, an electronic payment institution shall notify the user of the result in a manner agreed by the parties. However, this requirement does not apply if the contracted institution shows the amount deducted and the balance of the e-payment account or a stored value card to the user when a transaction is carried, and the electronic payment institution provides the user with related inquiry services.
中文原文 電子支付機構業務管理規則第12條
電子支付機構應於執行使用者支付指示後，以雙方約定之方式通知其結果。
但特約機構於使用者交易時顯示扣款金額及電子支付帳戶或儲值卡餘額，並由電子支付機構向使用者提供查詢服務者，不在此限。
但特約機構於使用者交易時顯示扣款金額及電子支付帳戶或儲值卡餘額，並由電子支付機構向使用者提供查詢服務者，不在此限。