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.
Read the full guide, including Hoptrail's model onboarding questions →
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. A student holding $16 million in a wallet was an early investor in SHIB, investing less than $5,000. He retained the records. A tradesman holding $8m in BTC was paid in bitcoin for a job he completed in early 2014, and kept the evidence.
The first conversation should establish six things:
- Entry point. When and how did the client 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?
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.
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.
- Bitcoin miner: mining pool details, reward records and payout wallet addresses.
- ICO or early-stage investor: token purchase agreements, contribution wallets and allocation confirmations.
- Founder or employee: employment or investment agreements, plus information on token vesting schedules and receiving wallets.
- High-frequency trader: the trading strategy - does it stack up? For very high volume cases, consider gathering data via CSV or read-only API.
- Long-term holder: self-custody wallet addresses and evidence of original purchases.
- Defunct platforms: archived emails, trade confirmations, account statements or bankruptcy claim records.
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.
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. Blockchain data 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.
Consider exchange APIs to simplify collection
Wallet addresses 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, exchange data helps close potential blind spots.
API connections are a clean, safe and comprehensive way to obtain that data - spot and futures trades, all deposits and withdrawals, balances, and profit and loss - and connect it to the prospect's wider activity. They provide a primary evidence base straight from the exchange, reduce back-and-forth, and give a fuller view of financial crime risk.
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.
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. Regulatory guidance, including from the European Banking Authority, Switzerland's FINMA and the Monetary Authority of Singapore, recognises the importance of verifying ownership or control of self-custody wallets as part of a risk-based approach.
There are two established methods:
- Cryptographic verification. The prospect signs a specific message using the private key associated with their wallet, demonstrating control without transferring any funds.
- Test transaction (Satoshi test). The prospect sends a small, pre-agreed amount from the relevant address to a designated wallet, providing independently verifiable evidence of control.
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, so it should be read alongside transaction histories, exchange records and the wider wealth narrative. Never request private keys or recovery phrases.
Red flags are not the same as missing records
The initial interview can highlight areas that need closer scrutiny. Watch for material inconsistencies in timelines, amounts or trading activity; significant gains the client cannot reasonably account for; vague explanations with no substantive detail on assets, venues or strategy; and persistent reluctance to share available information.
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 include a client who is proactive in explaining how the wealth was made, helps piece together uncertain parts of the story, and gives full, consistent answers that hold up to checking.
Even well-documented cases generate follow-up questions. Set this expectation with the client early.
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.
Read the full guide and Hoptrail's model onboarding questions →
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