What is KYC (know your customer)?

The identity verification process exchanges must complete before allowing deposits or trading, typically requiring government ID and proof of address.

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The identity verification process exchanges must complete before allowing deposits or trading, typically requiring government ID and proof of address.

KYC is a legal requirement under aml rules in most jurisdictions. "No-KYC" exchanges generally cannot accept fiat and may not serve regulated regions.

It is the first thing you encounter on any regulated venue and the most common reason a signup stalls. The useful thing to know in advance is that verification is tiered: what you submit determines not just whether you can trade but how much you can deposit and withdraw, and raising a limit later usually means submitting more.

How it works

The obligation comes from anti-money-laundering law rather than from exchange policy. The Financial Action Task Force, the intergovernmental body that sets the standards most countries implement, requires customer due diligence in its Recommendation 10 and extended its standards to virtual asset service providers in 2019. Jurisdictions then legislate their own versions: the European Union brought crypto exchanges into scope through Directive (EU) 2018/843, and in the United States exchanges register with the Financial Crimes Enforcement Network as money services businesses under the Bank Secrecy Act.

In practice a venue collects and verifies four things.

  1. Identity. A government-issued document, usually checked automatically against a photograph or a short video, to confirm the document is genuine and that you are the person on it.
  2. Address. A utility bill, bank statement, or official letter within a recent window, which is also what establishes your jurisdiction.
  3. Screening. Your details are checked against sanctions lists and politically exposed person databases.
  4. Source of funds. For larger accounts or unusual activity, documentation showing where the money came from.

Higher tiers unlock higher limits and more products. Ongoing monitoring continues afterwards, which is why an account verified two years ago can still be asked for updated documents or an explanation of a particular transfer.

Example

Illustrative walkthrough. You register with an email and password and can browse but not deposit. You submit a passport and a selfie, and within minutes a basic tier opens with a deposit limit in the low thousands. You want to transfer more, so you upload a bank statement showing your address, and a higher tier opens after a manual review of a day or two. Months later you deposit an amount well above your usual pattern and the venue asks for evidence of source of funds before releasing it for withdrawal. Nothing has gone wrong at any step. That is the process working as designed.

Why it matters when you buy

Verification decides where you can buy and how much, so it belongs at the front of the process rather than the middle of it. The jurisdiction pages show which venues serve your country or state, the exchange pages record what each requires, and what is KYC plus exchange verification tiers and limits cover the documents and thresholds in detail.

  • aml: the legal regime the requirement comes from
  • kyt: screening the transactions rather than the person
  • verification tier: the level that sets your limits
  • proof of address: the document establishing jurisdiction
  • travel rule: identity data sent with transfers
  • vasp: the regulated category exchanges fall into

Questions

Can I buy crypto without verification?

Decentralized exchanges and peer-to-peer trades do not verify identity, but they also cannot take a bank transfer or a card payment. Any route that touches the banking system involves verification somewhere.

Why was my document rejected?

Most often a glare or crop that obscures part of the document, a proof of address older than the venue's window, or a name that does not match exactly. The rejection message usually names the field.

How long does approval take?

Automated checks are often minutes. Manual review, higher tiers, and source of funds requests take longer, and a venue's own help documentation is the only reliable guide to its current timelines.

Guides that use this term

  • How to Buy Crypto With a Bank Transfer (ACH, SEPA, Faster Payments, Wire)

    Buying crypto with a bank transfer means moving currency from your bank into your exchange account over a domestic payment rail and then placing the order from the cash balance, which is normally the cheapest way to fund an account and differs from card funding mainly in speed and in the withdrawal holds that follow.

  • Exchange Verification Tiers and Limits Explained

    A verification tier is the level of identity evidence an exchange holds about you, and it controls what you are allowed to do: which deposit and withdrawal rails you can use, how much you can move in a given period, and in some cases which products and assets are available to your account at all.

  • Two-Factor Authentication for Crypto Accounts: What to Use and What to Avoid

    For a crypto exchange account, use a hardware security key if the platform supports one and an authenticator app if it does not, and move off SMS codes as your second factor because a phone number can be taken over by someone who never touches your device.

  • Centralized vs Decentralized Exchanges: Which Should You Use

    A centralized exchange holds your coins and your identity documents but lets you buy with a bank transfer or card, while a decentralized exchange requires no account and never takes custody but can only swap crypto you already own, so most people start on the first and use the second for assets it does not list.

  • Buying Crypto with a Card vs Bank Transfer

    A card buys crypto in seconds but costs the most, because the exchange charges a premium for card payments and many credit card issuers treat the purchase as a cash advance with its own fee and immediate interest, while a bank transfer is usually free or close to it and settles in anywhere from seconds to a few business days.