What is account takeover fraud and how do I prevent it?

Account takeover (ATO) is distinct from identity theft, which focuses on opening new accounts. ATO targets accounts you already have — banking, email, e-commerce, streaming — using credentials obtained through data breaches, phishing, credential stuffing, or SIM swap. The attacker's goal is to drain financial accounts, make purchases on stored payment methods, or use the account as a launch pad for further fraud against your contacts.

Credential stuffing is among the most common ATO methods: automated scripts try username-and-password combinations from previous data breaches across hundreds of websites simultaneously. If you have ever reused a password across multiple sites, a single breach can unlock all accounts that share that password. This is why password uniqueness is the most important individual security habit.

Real-time monitoring helps catch ATO quickly. Enable transaction alerts on all bank and credit card accounts so you are notified of every charge by text or email. Review active sessions in your email and social accounts periodically — Google, Apple, Facebook, and others show you what devices are currently signed in. A device you do not recognise is a sign of ATO. Revoking sessions and changing the password immediately limits the damage.

Some banks and services offer 'account monitoring' or 'login notification' features that alert you to every new login. Enable these wherever available. If you receive a notification about a login you did not make, treat it as a security incident: change the password, enable or change your 2FA, review recent transactions, and check linked accounts and apps for any changes the attacker may have made.