What is the TAC code and why is it crucial for bank security?

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The Critical Role of Transaction Activation Codes (TAC) in Banking Security

A Transaction Activation Code (TAC) is a one-time password, typically sent via SMS to a customer's registered mobile number, that is essential for authorising financial transactions. These codes act as a crucial layer of security, verifying that the person initiating a transaction is indeed the legitimate account holder. Banks use TACs to confirm the identity of the user before processing activities such as online purchases, fund transfers, or changes to account details.
Understanding the Function of TAC Codes

TAC codes are designed to be time-sensitive and unique to each transaction. When a customer initiates a transaction online or via a mobile app, the banking system generates a TAC and sends it to their registered phone. The customer must then enter this code back into the platform to complete the transaction. This two-factor authentication process, involving something the customer knows (their login credentials) and something they possess (their mobile phone with the TAC), significantly enhances security by preventing unauthorised access and fraudulent activities.
Common Scams Involving TAC Disclosure

A prevalent scam involves fraudsters impersonating bank officials or customer service representatives. In such schemes, victims are often contacted by scammers who claim there has been suspicious activity on their account, such as an unauthorised purchase. The scammer will then instruct the victim to share their bank account details and, critically, the TAC sent to their phone. Believing they are assisting with an investigation or resolving an issue, the victim divulges this sensitive information, which the scammer then uses to authorise fraudulent transfers from the victim's bank account or e-wallet. A recent instance saw a victim lose RM57,850 after sharing their TAC with someone posing as a bank officer.
Protecting Against TAC-Related Fraud

To safeguard against such scams, it is imperative for individuals to never share their TAC with anyone, regardless of who they claim to be. Bank officials will never request a TAC for any reason, as it is solely for the customer's use to authorise transactions. If a customer receives a suspicious message about an unauthorised purchase or activity, they should independently contact their bank using the official customer service hotline found on the bank's website or the back of their ATM card, rather than using any contact number provided in the suspicious message. This vigilance helps prevent financial losses stemming from the misuse of TAC codes.

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What is the TAC code and why is it crucial for bank security?

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