What documentation do exchanges require to verify the source of funds?

Exchanges typically request documentation at three levels.

First, documentation regarding the origin of the cryptocurrencies: transaction histories, exchange statements, wallet activity, or blockchain traceability.

Second, documentation proving the user’s financial capacity: bank statements, tax returns, pay stubs, contracts, invoices, sales contracts, or proof of professional activity.

Third, documentation regarding specific transactions: an explanation of the purpose of the transaction, identification of counterparties, commercial agreements, or the relationship to certain transactions.

The problem arises when transactions are old, were conducted on platforms that no longer exist, or when complete documentation is not available.

How do you properly prepare proof of the source of funds?

Proof of the source of funds should not be presented as a haphazard collection of documents.

It must be structured in a coherent and technically sound manner. The documentation must explain how the funds were acquired, what transactions were carried out, how the assets evolved, and why they were transferred to the exchange.

In many cases, it is necessary to first reconstruct the transaction history by analyzing wallets, exchanges, and blockchain transactions.

Reconstruction of Crypto Transactions

When there are tax implications, it may also be advisable to prepare a crypto tax report to help verify the consistency of the user’s net worth.

What Not to Do During an AML Screening

Mismanagement can significantly worsen the situation.

You should not submit incomplete documentation, give off-the-cuff explanations, provide contradictory accounts, ignore relevant requests, insist without a strategy, or respond emotionally.

Every communication is logged and may influence the exchange’s internal decision. A poorly worded explanation can broaden the scope of the review, trigger new requests, or even justify a unilateral account closure.

AML Withholdings on Corporate Accounts

When the frozen account belongs to a company, the review is usually more thorough.

The exchange may request articles of incorporation, powers of attorney, identification of beneficial owners, financial statements, contracts with customers, invoices, licenses, information on economic activity, and justification for crypto transactions.

For companies subject to MiCA regulations or holding a CASP license, a prolonged AML hold can create additional risks: impact on client funds, banking access issues, reputational damage, or doubts about the internal compliance system.

In these cases, it is advisable to coordinate the claim with a strategy for ongoing MiCA compliance.

Our Approach to Treating AML/PBC Retentions

AML/PBC cases require a prudent, technical, and strategic approach. The point is not to deny the existence of regulatory obligations, but rather to analyze whether the exchange’s specific actions comply with the principles of proportionality, justification, and reasonable duration.

In the first phase, we review communications, contractual terms, the documentation provided, the stated reason for the withholding, and the actual scope of the freeze.

In a second phase, we prepare the supporting documentation or the formal claim. When the documentation exists but is disorganized, we structure a coherent legal and technical narrative. When the documentation provided is already sufficient and the exchange continues to withhold the funds, we demand specific justification, a reasonable timeframe for resolution, and the release of the funds.

In a third phase, we evaluate complementary strategies, including escalating the matter to regulatory authorities or taking legal action when the amount involved and the circumstances warrant it.

International exchanges: Can they apply AML regulations from any jurisdiction?

Many exchanges cite AML requirements in the jurisdiction where they are registered, even though they provide services to European users.

This issue must be analyzed on a case-by-case basis. The exchange’s structure, the user’s location, the contractual terms, and the market the platform targets are all relevant factors in determining which legal framework applies.

Not every invocation of the AML justifies any retention. The lack of a legal basis, the absence of a reasonable time limit, or impossible requirements can be challenged in court.

What risks does an inadequate response to an AML review pose?

A hasty response can have more serious consequences than the initial delay.

It may broaden the scope of the investigation, result in a complete account freeze, justify unilateral closure, hinder future evidence collection, or even trigger internal or external reports if the platform determines that there are significant inconsistencies.

If, in addition, the account is completely locked, it may be necessary to implement a specific strategy for unlock the account on the exchange.

When is it appropriate to challenge an AML withholding, and when is it not?

Not all AML seizures can be challenged with the same likelihood of success.

Cases tend to have a higher likelihood of success when funds are withheld beyond a reasonable time without explanation, when impossible documentation is required, when the entire balance is frozen due to a single transaction, when the specific alert is not identified, or when the platform lacks a clear regulatory framework.

Feasibility is lower when there are unjustified high-risk transactions, a refusal to provide basic documentation, objective evidence of illicit activity, or a court order requiring the exchange to maintain the restriction.

Our work always begins with an honest assessment of feasibility.

Preventive Protection: How to Avoid Future AML Withholdings

The best way to avoid future withholdings is to maintain clear traceability.

It is advisable to keep records of exchange transactions, bank statements, tax returns, documentation related to your own wallets, contracts, invoices, and contemporaneous explanations of complex transactions.

It is also advisable to avoid high-risk services, ensure consistency between trading volume and the declared profile, document relevant transactions, and prepare documentation justifying the source of funds in advance.

In crypto companies, prevention requires robust compliance systems, operational documentation, and internal controls.

What Our AML/PBC Withholding Intervention Offers

We do not promise to resolve all withholding issues, nor do we guarantee the release of funds in all cases.

What we provide is rigorous legal analysis, an honest assessment of feasibility, structured preparation of supporting documentation, formal appeals when funds are disproportionately withheld, and a defense based on a deep understanding of the AML/CFT framework and the exchange’s contractual limitations.

When an exchange freezes funds on the grounds of an AML review without offering a clear solution within a reasonable timeframe, it is advisable to take action before the freeze is extended indefinitely or leads to account closure.

The IN DIEM team, together with Cryptoveritas 360, offers ongoing legal and technical support to analyze your situation and develop the most appropriate strategy. :contentReference[oaicite:0]{index=0}

Request an initial assessment or call us at (+34) 610 667 452.