The National Credit Union Federation of Korea has announced that it has officially been operating the "FDS (Fraud Detection System) Monitoring Room" since August 1 of last year, actively working to prevent various financial frauds including voice phishing.
The FDS is a system that comprehensively analyzes terminal information, connection information, and transaction information that occur in the customer's financial transactions to detect abnormal transactions. It is a key means of preventing electronic financial accidents and telecommunication financial fraud, with the Financial Supervisory Service and the Financial Security Institute establishing operational guidelines and actively encouraging the financial sector's adoption and utilization.
Since its official launch in August of last year, the National Credit Union FDS Monitoring Room has blocked a total of 721 suspicious transactions by the end of July 2025, preventing approximately 7.3 billion won in financial fraud damages, while leveraging accumulated data and specialized personnel to establish a sophisticated response system for abnormal transactions.
In fact, when a series of transactions with a different pattern than usual occurred through an ATM at a local credit union, the monitoring room immediately detected it and began emergency response actions. The transaction involved amounts being withdrawn from a credit union account to another financial institution's account, which posed a risk of being fraudulently taken. The credit union shared the situation immediately with the counterpart financial institution and union, blocked the withdrawal, and a credit union staff member visited the member's home to inform them of the voice phishing in cooperation with the police, preventing any losses.
In another case, a member who received about 100 million won through loans and insurance premium loans was found to have transferred the entire amount to a financial institution's account with no previous transaction history. The credit union immediately contacted the member to confirm the purpose of the transaction and discovered that a remote control fraud was underway via a malicious app, quickly blocking further withdrawals to prevent additional losses.
The credit union plans to continue developing detection scenarios to respond to new types of financial fraud based on accumulated cases in the field and to strengthen its proactive prevention capabilities through system enhancements.
Park Yong-nam, head of the Financial Consumer Protection Department, noted, "The FDS Monitoring Room is the front line protecting the valuable assets of credit union members," adding, "We will further solidify trust in credit union finance through the expansion of specialized personnel and system enhancements."