Account takeovers (ATO) represent a growing form of fraud, where unauthorized individuals gain access to online accounts to steal money or personal data, posing significant challenges for both consumers and businesses. In 2023, 29% of American adults were victims of ATOs, prompting companies to enhance security measures such as multi-factor authentication (MFA) and two-factor authentication (2FA), although these can introduce friction for legitimate users. To address this, Fingerprint's Smart Signals, in conjunction with visitorID, offers a solution by providing real-time insights into online visitors, allowing businesses to identify potential fraudulent activities, even from anonymous or VPN users, while maintaining a seamless customer experience. This technology detects anomalies such as browser tampering, IP geolocation changes, and the use of VPNs or rooted devices, assigning unique visitor IDs to differentiate between legitimate users and potential threats. By integrating these signals into fraud protection workflows, companies can effectively prevent bot-driven ATO attacks and enhance the overall security of online transactions, as demonstrated by successful implementations like Dropbox's Platform Abuse Team.