Citibank does not send you email asking for your Citibank Online User ID and password, other types of password/PIN or other sensitive information. If you’ve received suspicious emails purporting to be from Citibank, please notify us immediately by calling our 24-hour CitiPhone Banking at (852) 2860 0333. Please click here for more information on fraud prevention advice.
To enhance online banking security, input of Online Authorization Code (OAC) will be required for rewards redemption starting from March 22, 2015. The OAC will be sent to your registered mobile phone via SMS when you redeem rewards.
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We also recommend you clearing the browser cache occasionally and relevant guidance can be obtained here.