The Financial Supervisory Service told retail banks on Oct. 1 to rotate customer-facing anti-phishing hotline numbers printed on statements, ATM screens, and branch posters every 90 days, closing a loophole voice scammers exploited by cloning static helplines during Chuseok. The rule takes effect immediately for the largest internet and universal banks, with regional lenders given until November to comply.
Technology assist
Major banks will push app updates this week that highlight the active hotline in a pinned banner, reducing reliance on paper statements that scammers photocopy. The FSS said it will publish a quarterly fraud loss dashboard alongside the rotation calendar so lawmakers can track whether the policy moves the needle.
Assembly hearings last week put 2025 voice-phishing losses above 1.25 trillion won, intensifying pressure on regulators to move beyond awareness campaigns. The FSS said rotated numbers will sync with a KISA-maintained registry that caller-ID apps and carrier networks can query in real time.
How rotation works
Each bank receives a pool of hotline numbers tied to fraud-reporting desks. Every quarter, institutions must update PDF statements, mobile banking splash screens, and ATM marquees to display the active number while retiring the prior one to a monitored voicemail that warns callers of impersonation attempts.
Employees may no longer handwrite helplines on whiteboards—a common practice at busy branches during holiday weeks. Printed materials must match the registry entry or face examination penalties in the FSS’s October inspection cycle.
Industry pushback
Bank IT heads warned that quarterly rotations increase call-center training load and risk misprints during bulk statement runs. The FSS offered a shared template library and said it will audit only the largest consumer-facing channels in the first 90-day window.
Card issuers are not yet subject to the same cadence, though the FSS said it will extend the rule if phishing texts continue to mimic card dispute lines.
Consumer takeaway
Customers should verify hotlines inside authenticated mobile apps rather than trusting SMS links, even as numbers rotate. KISA’s October advisory adds National Health Insurance premium scams to the watch list, a separate campaign from the banking rotation order but part of the same holiday fraud wave.
Enforcement
Non-compliance triggers supervisory letters and can affect executive pay clawbacks under strengthened accountability rules adopted this summer. For most households, the practical change is noticing a new three-digit suffix on October statements—a small line item in a broader fight that still depends on callers refusing to move money to strangers.