Crypto wealth onboarding

Crypto Wealth: What Should You Ask For?

An essential compliance guide to collecting the right information when onboarding crypto HNWIs.

Relationship ManagersFinancial Crime TeamsCompliance Officers

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In this guide

Start with the story

Draw out how the wealth was made before asking for documents.

Ask the right questions

Match each request to the client’s wealth journey.

Consider data collection

When and why to escalate to alternative data collection methods.

Verify & review

Best practices on wallet ownership and how to spot potential risks.

Jump to the model questions →

A question that comes up regularly for compliance teams onboarding crypto HNWIs is:

What information should we ask the client to provide?

Getting this right at the outset helps establish how the wealth was generated, reduces unnecessary back-and-forth, and makes the onboarding process considerably smoother. This guide sets out what to collect, how to collect it, and what to expect from the resulting analysis.

The narrative

Start with the story.

The narrative comes first. Most crypto HNWIs are eager to explain how they made their money. The relationship manager’s role is to obtain a clear account of that journey before requesting detailed documentation.

Some stories sound extraordinary. That does not make them high-risk.

$16m

A student holding $16 million in a wallet was an early investor in SHIB, investing less than $5,000. He retained the records.

2014

A tradesman with $8m in BTC. He was paid in bitcoin for a job he completed in early 2014 and kept the evidence.

Key items to establish from the first conversation

Entry point

When and how did you first acquire crypto? How was the investment funded?

Platforms

Which exchanges or other services were used to buy, trade or liquidate?

Wealth creation

Which assets, investments or strategies generated the largest gains, and when?

Custody

Which self-custody wallets were used, including historical wallets?

Trading activity

Active trading, derivatives or leverage? Staking, DeFi or other activity?

Liquidation

When, where and how were gains realised and converted into fiat or other assets?

Building a questionnaire? See Hoptrail’s model questions.

Cover the basics

The first conversation does not need every transaction detail. It needs the key events, timelines and sources of wealth, so that the evidence requests that follow can be targeted.

The evidence

Match the questions to the story.

No two crypto wealth journeys are the same. A bitcoin miner, an early ICO investor and a high-frequency trader leave very different records. The evidence request should follow the narrative, and where possible, avoid a rigid, one-size-fits-all questionnaire.

Evidence to request

Bank statements documenting the original investment funds and later fiat withdrawals may also be required.

A list of addresses is not proof of control.

Clients should list every wallet they have owned or controlled, including inactive ones. Where wallets are material, banks should verify control independently. See verifying wallet control.

Missing records are not a barrier.

Defunct exchanges, lost wallets and unavailable records are a common feature of crypto wealth reviews, particularly for long-term holders. The advantage of blockchain data is that it can often be used to reconstruct historical fund movements, establish timelines and corroborate a client’s account, even where gaps remain in the underlying records.

Enhanced data collection

Consider exchange APIs to simplify collection.

Wallet addresses will show funds entering and leaving an exchange. They cannot show what happened inside the exchange account. For traders whose wealth derives partly or wholly from exchange trading, that gap matters. For compliance teams assessing financial crime risks beyond the blockchain, access to exchange data helps close potential blind spots.

API connections are a clean, safe and comprehensive way to obtain that data and connect it to the prospect’s wider activity.

On-chain analysis alone

Deposits inWithdrawals out

With exchange data

Deposits inWithdrawals out

Spot & futures

All deposits & withdrawals

Balances

Profit & Loss

The benefits of exchange API connections

Comprehensive data capture

Every data point, in one pull.

Primary evidence base

Records straight from the exchange.

Reduces back and forth

Fewer document requests and follow-ups.

Enhanced risk assessment

A 360-degree view of financial crime risk.

The analysis

What happens once the data is collected.

The initial request is the starting point. Hoptrail combines the client’s disclosures with on-chain and exchange-level analysis to establish three things.

Wealth creation

Where, when and how the wealth was generated, tied to identifiable transactions and trades.

Financial crime exposure

Links to sanctioned entities, illicit services or other high-risk counterparties.

Unresolved gaps

Missing records, unexplained transfers or inconsistencies that need further examination.

Regulatory best practice

Verifying wallet control.

A list of cryptocurrency addresses does not, by itself, establish that a client owns or controls the associated wallets. Where a wallet is material to a source of wealth assessment, banks should seek independent evidence of control. Verification of self-custody wallet ownership or control is increasingly recognised as regulatory best practice and forms an important part of a robust crypto onboarding process.

EBA

FINMA

MAS

Regulatory guidance, including from the European Banking Authority, Switzerland’s FINMA and the Monetary Authority of Singapore (MAS), recognises the importance of verifying ownership or control of self-custody wallets as part of a risk-based approach to crypto transactions.

Two established methods

Cryptographic verification

Prospect walletSigned messageBank verifies

The prospect signs a specific message using the private key associated with their wallet, demonstrating control without transferring any funds.

Test transaction (Satoshi test)

Prospect walletSmall, pre-agreed amountDesignated wallet

The prospect sends a small, pre-agreed amount from the relevant address to a designated wallet, providing independently verifiable evidence of control.

Where verification is impractical

For historical or inaccessible wallets, assess alternative supporting evidence and document any limitations clearly. Proof of control only establishes control of the address at that point in time. Verification should therefore be read alongside transaction histories, exchange records, and the wider wealth narrative.

References: EBA Guidelines on the Travel Rule (EBA/GL/2024/11); FINMA Guidance 02/2019; MAS Notice PSN02. Never request private keys or recovery phrases.

Risk indicators

Red flags are not the same as missing records.

The initial interview can highlight areas that need closer scrutiny. Here are some potential scenarios to watch out for - both during the initial interview and in subsequent analysis.

Material inconsistencies

Timelines, amounts or trading activity that do not align with the available information.

Unexplained wealth creation

Significant gains or inflows the client cannot reasonably account for.

Vague explanations

No substantive detail on assets, venues or trading strategy.

Unwillingness to cooperate

Persistent reluctance to share available information or answer reasonable questions.

These indicators prompt further examination, not automatic rejection. Struggling to recall trades and wallets from 2014, or to produce records from a defunct exchange, is not suspicious in itself. How the client engages is more telling than whether every record survives.

Positive signals

Proactive in explaining how the wealth was made

Helps piece together uncertain parts of the story

Full, consistent answers that hold up to checking

Managing expectations

Even well-documented cases generate follow-up questions. Set this expectation with the client early. Hoptrail keeps each request targeted, so the bank gets the evidence it needs without unnecessary demands on the client.

Not every transaction will be documented, and not every gap can be closed. The aim is enough of the right evidence to verify the wealth story, identify material risk and give compliance a clear, defensible basis for its decision.

Model questionnaire

Model questions for crypto onboarding.

Here are some model onboarding questions for banks to adapt into their own onboarding questionnaires. The questions draw out the wealth story first, then the evidence that supports it.

The wealth story

Describe, in your own words, how you acquired, grew and realised your cryptocurrency wealth.

When did you first acquire cryptocurrency, which asset was it, and how was the purchase funded?

Which assets, investments or strategies generated your largest gains, and approximately when?

Did you trade actively, use derivatives or leverage, or take part in mining, staking or DeFi?

Wallets

List the public addresses of all wallets you have owned or controlled, on every blockchain, including inactive ones.

Which wallets do you still control? Can you verify control by signing a message or sending a small test transaction?

Are there wallets you can no longer access? If so, what happened to them?

Exchanges and liquidation

Which exchanges, brokers or other platforms have you used, including any that have since closed?

For accounts you can still access, can you provide read-only API access or CSV exports?

When, where and how did you convert crypto into fiat or other assets, and which bank accounts received the proceeds?

Supporting evidence

Do you hold token purchase agreements, ICO allocation confirmations or vesting agreements?

If you mined, which pools did you use, and do you hold reward or payout records?

If you used platforms that no longer operate, do you retain emails, confirmations or statements?

Is any part of your history no longer documented? Please explain what is missing and why.

Keep it flexible

Let the narrative lead. Add the follow-ups each client’s story calls for.

Gaps are not red flags

Missing records are common. Engagement and consistency matter more.

Never ask for keys

Private keys and recovery phrases must never be requested.

Onboarding a crypto client? Talk to Hoptrail.

Speak to our team about what to request, how to collect it and how Hoptrail turns it into a clear, defensible onboarding decision.

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