KYC (Know Your Customer)

Know your customer refers to the identity verification that regulated financial institutions must perform before serving a client. The framework descends from the US Bank Secrecy Act of 1970, and FinCEN guidance issued in 2013 applied it squarely to bitcoin exchanges, which is why buying coins on a major platform requires government identification.

Why it matters

KYC is the gateway between bitcoin and the banking system. Exchanges collect and retain identity documents, monitor transactions, and report suspicious activity, and once a withdrawal leaves a KYC platform the associated addresses can be linked to a name in the exchange's records. That linkage is durable: blockchain analysis can follow coins across the public ledger, so a single KYC touchpoint can identify a long chain of activity.

The practice also concentrates risk. Exchange databases of passports and selfies have been breached repeatedly, turning compliance archives into honeypots, and critics argue the surveillance burden falls on ordinary users while sophisticated criminals route around it.

In the gold vs bitcoin debate

Gold changed hands anonymously for most of history, and cash purchases of coins remain lightly documented in many jurisdictions. Bitcoin, born as censorship-resistant money, is in practice acquired mostly through the most heavily surveilled channel in finance. The tension between bitcoin's permissionless design and its KYC-wrapped on-ramps is a recurring theme in the debate.