A recent investigation by the BBC has revealed significant vulnerabilities in voice authentication systems used by major banks, including Santander and Halifax. A BBC reporter successfully bypassed security measures by utilizing an AI-generated clone of her voice, created from publicly available radio interview audio samples. This incident highlights a concerning trend, as banks continue to rely on basic voice recognition and personal information such as names and birthdays for account access. Experts are criticizing this reliance on outdated security methods, suggesting that the sophistication of AI voice cloning poses a serious threat to customer authentication systems. The investigation serves as a wake-up call for financial institutions to reassess their security protocols in light of advances in artificial intelligence and voice cloning technology.