Multi-accounting involves a single individual creating multiple accounts on online platforms, often to bypass rules or gain unfair advantages, posing significant challenges for fraud prevention teams across various industries such as gaming, fintech, streaming, and marketplaces. This practice can distort analytics, undermine trust, and enable fraud by manipulating systems meant for single users, leading to revenue loss and compliance risks. Fraudsters use tactics like device farms, anti-detect browsers, VPNs, and stolen credentials to mask their activities, but these leave technical footprints detectable through methods like device intelligence, IP reputation, and behavioral analysis. Companies like Fingerprint leverage advanced device intelligence and Smart Signals to generate unique identifiers for users, helping to identify and mitigate multi-accounting by analyzing browser and device attributes and detecting anomalies such as automated browsing or unusual network activity. By using a layered defense approach combining these tools, businesses can effectively block fraudulent accounts while maintaining a seamless experience for legitimate users.