What's happening
Citibank Singapore is discontinuing its Telephone Personal Identification Number (TPIN) effective 19 July 2026. After this date, TPIN will no longer be accepted as an authentication method for phone-based banking interactions, including calls to the Citi Phone Banking line at 6225 5225.
Cardholders who currently use TPIN to authenticate annual fee waiver requests, credit limit adjustments, or account enquiries over the phone will need to use an alternative verification method.
What TPIN is — and why it matters for fee waivers
TPIN is a separate 6-digit PIN used exclusively for telephone banking interactions with Citibank. Unlike your card PIN (used at ATMs and POS terminals), TPIN authenticates your identity when speaking to a live agent or navigating the automated IVR system.
For credit card annual fee waiver requests, TPIN has been the primary IVR authentication method. Callers enter their TPIN via DTMF tones to verify identity before being routed to the retention team.
After 19 July, callers who previously used TPIN will need to verify via one of the following:
- One-time password (OTP) sent to the registered mobile number
- Citi Mobile app token authentication
- Physical card details (card number + expiry for lower-risk enquiries)
Why Citibank is making this change — and why other banks will follow
This is not an isolated product decision. It is part of a coordinated sector-wide shift directed by the Monetary Authority of Singapore (MAS).
In February 2025, MAS issued guidance requiring major retail banks to phase out single-factor authentication methods for high-risk transactions by mid-2026, with a compliance target of 70% of major bank transactions by June 2026. Static PINs used over telephone channels — including TPIN — fall within scope.
What this means: Citibank is among the first to act, but DBS, OCBC, UOB, HSBC, Standard Chartered, and Maybank Singapore are expected to follow with equivalent changes over the next 12–24 months. The broader direction is toward app-based authentication (push notifications, biometric confirmation) for all remote banking interactions.
What Citi cardholders should do before 19 July
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Ensure your registered mobile number is current. OTP-based verification depends on SMS delivery to your registered number. Log in to Citi Mobile or call 6225 5225 to verify your number on file.
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Download and activate Citi Mobile if you haven't already. App-based token authentication is the most frictionless replacement for TPIN and does not depend on SMS delivery.
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Request your annual fee waiver before 19 July if your anniversary is approaching. The transition period will involve higher-than-normal call volumes and potential IVR disruptions.
The bigger picture: phone-based waivers are not disappearing
It is worth separating two things: authentication method and waiver channel.
TPIN is an authentication method. Annual fee waiver requests will still be processed via phone after 19 July — the authentication step simply changes. The retention pathway, the 70–98% success rate, and the ability to request a waiver by calling 6225 5225 remain in place.
What is changing — more slowly, but directionally — is the channel itself. MAS guidance and bank investment in digital self-service suggests that app-based waiver requests (currently available in limited form at UOB and DBS) will become the default for newer cards within the next 2–3 years. Phone-based waivers will remain viable for existing cardholders through at least 2027–2028.
Uncommon stat: how many Singaporeans have Citi cards
Citibank Singapore is among the top 5 credit card issuers in Singapore by card count. Based on MAS credit card statistics (approximately 9.5 million credit and charge cards in circulation across Singapore as of 2024), Citibank's estimated share represents roughly 1–1.2 million cards. A significant proportion carry annual fees of S$160–S$550 depending on the card tier.
The discontinuation of TPIN affects every one of these cardholders who uses phone banking.
How clawbacks.ai handles this
Our AI agent handles authentication dynamically — including OTP-based flows where the customer's registered mobile number receives an SMS mid-call. If Citibank's new authentication requires OTP verification, our system supports that flow without any action required from you.
Your registration details, including your mobile number, are already stored when you sign up. We handle the rest.