Citibank will send “2way Transaction Confirmation SMS” to you in the event of suspicious transactions, and allow you to confirm by replying to our SMS, protecting your interests. You can also contact us at (+852) 2860 0325 (Credit Card Service) | (+852) 2860 0330 (Banking Service). To protect your interests and avoid unauthorized transactions, your banking account or credit card will be temporarily suspended in the event of the following: