Anti-Money Laundering is not a single law but an entire compliance apparatus that crypto platforms build to stop illicit funds from being cleaned through digital assets. Where the short definition covers the basic goal, the practical machinery includes customer due diligence at signup, ongoing transaction monitoring, sanctions screening, and mandatory reporting of suspicious activity to financial authorities.
The global baseline comes from the Financial Action Task Force (FATF), which extended its Recommendation 16 to virtual asset service providers in 2019, effectively treating crypto exchanges like banks for compliance purposes. This is where the so-called Travel Rule originates: platforms above a certain transaction size must collect and share sender and receiver information, similar to a bank wire. The United States applies this at a $3,000 threshold, while the European Union's Markets in Crypto-Assets framework applies it to every transfer regardless of amount.
In practice, a Centralized Exchange (CEX) combines identity verification with wallet-screening software that traces a deposit's on-chain history for links to darknet markets, ransomware, or sanctioned addresses before funds are credited. Ironically, a blockchain's public, permanent ledger makes this tracing easier than with cash. Regulators worldwide have sharply increased enforcement, issuing large fines against exchanges that fail to catch layered or laundered transactions, making a robust AML program a condition of holding a license rather than a voluntary best practice.