Onboarding Crypto Clients: The Accounting Firm's Checklist

A crypto client is not a normal new client with a wallet address attached. Onboarding has to deliver three things the standard process does not: complete access capture, an engagement letter that scopes on-chain work and its limits, and the firm's own due diligence on a higher-risk profile. This guide is that discipline, hedged, because these are the firm's obligations under its professional and AML rules.

TL;DR

• Crypto onboarding adds: complete wallet/exchange access capture, a crypto-scoped engagement letter, and the firm's own client due diligence.
• A standard new-client form + one address is insufficient — it neither establishes complete data nor defines responsibility.
• Treat "is this the complete set of addresses/accounts?" as a documented client representation, not an assumption.
• Engagement letter scopes chains/wallets/activity, completeness reliance, clean-up vs ongoing, DAC8 handling, advisory limits.
• The firm has its own AML/KYC obligation; a crypto client can be higher-risk — jurisdiction-/professional-body-specific.
• Declining/exiting is a legitimate professional decision. Obligations are the firm's; not professional/legal/AML advice.

Three things beyond the normal process

A form plus an address is insufficient on all three. These are the firm's obligations under professional and AML rules.

Access capture

Capture every wallet and exchange account in scope, read access sufficient to reconcile, and a confirmation the list is complete — an undisclosed wallet means the books cannot be reconciled to the chain and the engagement cannot be delivered as represented. Make "is this the complete set?" a documented client representation (the access half of scoping).

The engagement letter

Beyond standard terms, scope: which chains/wallets/activity types are covered; reliance on client-provided completeness; historical clean-up vs ongoing work; how DAC8 reconciliation/readiness is handled; and which determinations (classification, tax positions) are advisory or require the client's own counsel. The aim is to define responsibility precisely — wording is a firm/professional-rules matter, not a blind template.

The firm's own AML/KYC

An accounting firm generally has its own client due-diligence and AML obligations under its professional and jurisdictional rules, and a crypto client can present a higher-risk profile affecting due-diligence depth and ongoing monitoring. This is the firm's own obligation, separate from the client's business AML. Requirements are jurisdiction-/professional-body-specific, compliance-counsel-confirmed — not stated here.

The right to decline

Onboarding should preserve the ability to decline or exit: if access cannot be made complete, the risk profile is outside acceptance criteria, or the client will not provide required information, not proceeding is a legitimate professional decision. Build acceptance criteria and exit terms into onboarding — a firm judgement under professional rules.

Practical guidance

1. Capture complete access with a documented completeness representation.
2. Use a crypto-scoped engagement letter — chains, reliance, clean-up, DAC8, advisory limits.
3. Run the firm's own client due diligence — crypto can be higher-risk.
4. Separate the firm's AML obligation from the client's business AML.
5. Keep clear acceptance/exit criteria — declining is legitimate.
6. Confirm acceptance/DD/engagement terms with the professional body and compliance counsel — jurisdiction-specific; not professional/legal/AML advice.

How vendor tools support onboarding

Cryptio and Bitwave help capture and validate wallet/exchange connections so completeness of access can be assessed at onboarding. The tool supports access capture; the engagement terms, client due diligence, and acceptance decision remain the firm's obligation under its professional and AML rules.

How Wag3s helps

Wag3s for accountants supports complete wallet/exchange access capture and flags gaps so the firm can document completeness at onboarding — while the engagement letter, the firm's own client due diligence, and acceptance stay the firm's obligation. See the accountants page.

Further reading

• Building a Crypto Accounting Practice
• Scoping a Crypto Accounting Engagement
• DAC8 Client Readiness (Accounting Firm)
• AML & KYC for Crypto Businesses
• Expert-Comptable & Crypto Clients (France)
• Pricing Crypto Accounting Engagements

Sources

• Crypto onboarding adds complete wallet/exchange access capture, a crypto-scoped engagement letter, and the firm's own client due diligence on top of standard client acceptance (a form + one address is insufficient)
• Access capture requires every in-scope wallet/exchange, read access to reconcile, and a documented client completeness representation (undisclosed wallet → books cannot reconcile to chain)
• Engagement letter scopes chains/wallets/activity, completeness reliance, clean-up vs ongoing, DAC8 handling, and advisory/classification/tax limits — wording is a firm/professional-rules matter
• An accounting firm has its own client due-diligence/AML obligations (crypto often higher-risk) separate from the client's business AML; declining/exiting is a legitimate professional decision; jurisdiction-/professional-body-specific — not professional/legal/AML advice