What is a TAC code for a bank?

A TAC code, or Transaction Authentication Code, is a security feature used by banks to verify the authenticity of a transaction. It is typically a unique, time-sensitive code generated for a specific transaction and sent to the user via SMS or email. The TAC code helps prevent fraud by confirming that the person initiating the transaction is authorized to do so. Users must enter this code to complete certain banking transactions, adding an extra layer of security.