Account creation fraud is a pervasive issue for online businesses, where fraudsters create multiple fake accounts to exploit services, drain resources, and compromise user security. This form of fraud can manipulate product reviews, skew polls, and contests, bypass purchase restrictions, and spread spam or misinformation. Businesses face significant financial losses, degraded user experiences, and potential security vulnerabilities. To combat this, companies are adopting multi-layered defenses such as CAPTCHA challenges, multi-factor authentication, cookies, and device/browser fingerprinting. These measures help distinguish between legitimate users and fraudsters, though they must be balanced with user experience considerations. Browser and device fingerprinting are highlighted as particularly effective, offering persistent user identification even when fraudsters attempt to mask their identities. The text emphasizes the importance of sophisticated detection methods in maintaining the integrity and trustworthiness of online platforms.