KYC

KYC, short for Know Your Customer, is a regulatory requirement that obliges financial institutions and many other regulated businesses to verify the identity of their customers before providing certain services. The process originated in traditional banking as a tool to prevent money laundering, fraud, and the financing of illegal activity. As bitcoin exchanges and other crypto-related services began operating, they became subject to the same regulatory frameworks in most jurisdictions. Today, users who sign up for a regulated exchange or custodial service are typically asked to provide a government-issued photo ID, proof of address, and sometimes a selfie or video confirmation before their accounts are activated or withdrawal limits raised.

For exchanges and financial service providers, KYC compliance is a legal obligation rather than a choice. Regulators in most countries require any business handling money or financial assets above certain thresholds to collect and verify customer information, file reports on suspicious transactions, and maintain records for auditing purposes. Failure to comply can result in fines, loss of operating licences, or criminal liability for the business and its executives. The scope and strictness of KYC requirements vary by country and are subject to ongoing regulatory change. Some jurisdictions have more detailed requirements than others, and cross-border rules can add further complexity for international platforms.

Bitcoin was in part designed around the principle that financial transactions should not require permission or identity disclosure to a third party. The protocol itself has no KYC layer: anyone can receive or send bitcoin using only a public address, without providing a name or any other personal information. This property is often described as part of what gives bitcoin its permissionless character. The existence of KYC requirements at the exchange layer creates a point of tension between that original ethos and the regulatory environment in which most users actually access bitcoin. Users who acquire bitcoin through a KYC exchange have their identity linked to their purchase, while those who obtain it through non-custodial means or peer-to-peer channels may retain more privacy. Both paths exist within the ecosystem and each comes with its own practical considerations.