KYC and AMLKYC
Know Your Customer (KYC) rules require brokers and exchanges to verify who their customers are; anti-money laundering (AML) rules require them to watch for and report suspicious activity. They are why platforms ask for ID and proof of address.
KYC and AML are the checks a Broker or Exchange runs before and after you open an account. KYC is about knowing who you are; AML is about spotting and reporting money that looks dirty. Rules differ by country, but the idea is the same almost everywhere: no anonymous accounts, and unusual activity gets a second look.
- Category
- Trading Basics
- Reading time
- 4 min
- Also called
- Know your customer, Anti-money laundering, Customer due diligence
- Updated
KYC and AML in plain words
Under FINRA's know-your-customer rule, firms must make a real effort to learn and keep the essential facts about each customer, both when an account opens and afterwards.1
Anti-money-laundering rules exist to spot and report suspicious activity, including securities fraud and market manipulation.2
For companies, FinCEN's CDD Rule requires covered institutions to identify and verify the natural persons, known as beneficial owners, who own or control the company.3 These are US rules; other countries have their own versions, so rules differ by country.
How KYC and AML checks work
Collect identity details
Expect to give your name, address, date of birth and an ID number — firms are required to collect them.2
Verify who you are
The firm checks these details until it reasonably believes you are who you say you are.2
Check owners of companies
For business accounts, the firm identifies and verifies the beneficial owners behind the company.3
Learn your profile
The firm records essential facts about you, such as your experience and goals.1
Monitor activity
Transactions are watched against your profile, and the programme must be designed so the firm detects and reports suspicious activity.2
Refresh the file
Expect requests to update documents when your details change or ID expires.
Worked examples
Example 1 — Smooth onboarding
Account approvedA hypothetical new trader uploads a valid ID and a recent utility bill, and the details match.
| ID check | Passed |
| Account | Opened |
The details checked out quickly, so the account opened without delay.2
Example 2 — Unusual transfers
Trading delayedA hypothetical account that usually deposits 500 a month suddenly receives many large transfers from unrelated third parties.
| Normal deposits | 500 |
| Account status | Frozen for review |
AML programmes must be designed so the firm detects and reports suspicious activity, so the account is paused while it asks questions.2
Example 3 — Company account
Extra paperworkA hypothetical small company opens a trading account and lists two owners.
| Owners listed | 2 |
| Checks | Both verified |
The CDD Rule asks the firm to identify and verify the beneficial owners of legal entity customers, so both people are checked.3
KYC vs AML
| Aspect | KYC | AML |
|---|---|---|
| Main question | Who is the customer? | Is the money or activity suspicious? |
| When | Mainly at account opening | Throughout the relationship |
| Typical tools | ID, address proof, profile | Monitoring, alerts, reports |
| Outcome | Account opened or refused | Review, report or restriction |
Where you meet KYC and AML
Opening an account
Every new Broker account starts with identity checks.
Crypto platforms
Regulated crypto Exchange sites ask for ID before deposits or withdrawals.
Margin and leverage
Firms ask extra questions before allowing Margin or Leverage.
Large withdrawals
Big or unusual withdrawals can trigger a review.
Advantages and disadvantages
Advantages
- Makes fraud and identity theft harder.
- Helps keep criminal money out of markets.
- Lets firms offer suitable products.
- Builds trust in regulated platforms.
Disadvantages
- Onboarding takes time and documents.
- Accounts can be frozen during reviews.
- You share personal data with the firm.
- Rules differ by country, which can confuse cross-border traders.
Going deeper
Read as far as you need. Each level builds on the one before it.
Know your customer
Beginner
FINRA Rule 2090 requires reasonable diligence to know the essential facts about every customer and about anyone acting on the customer's behalf.1
Risk-based programmes
Intermediate
A sound AML programme includes a risk-based identification process that confirms each customer's real identity.2
Beneficial owners
Advanced
FinCEN's CDD Rule extends checks to the people who own, control and profit from companies that open accounts.3 Other countries apply similar ideas under their own laws, so the details differ by country.
Common mistakes
Using old documents
Expired ID or an old address slows approval.
Mismatched details
Names must match across ID and account.
Ignoring requests
Unanswered document requests can lead to restrictions.
Using unregulated sites to skip checks
No KYC often means no protection either.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- KYC checks who you are.
- AML watches for suspicious activity.
- Company accounts need beneficial owner checks.
- Reviews can delay trading.
- Rules differ by country.
Frequently asked questions
Why does my broker need proof of address?
Can an account be frozen?
Are the rules the same everywhere?
Further learning
- Broker
Who runs the checks.
- Exchange
Where trading happens.
- Margin
Accounts with extra checks.
- Trading Fees and Commissions
Other account costs.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- FINRA. FINRA Rule 2090. Know Your Customer (opens in a new tab) Checked .
- FINRA. Anti-Money Laundering (AML) (opens in a new tab) Checked .
- FinCEN. CDD Final Rule (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.