Bank blocking your account over crypto: how to deliver conclusive proof of origin

Why does a bank block your account over crypto?

A bank usually blocks your account over crypto not because it finds crypto suspicious, but because it is legally required to review the origin of unusual money flows. Under the Dutch Anti-Money Laundering and Anti-Terrorist Financing Act (Wwft), a bank must investigate and report unusual transactions. A large deposit from an exchange, a series of smaller deposits, or an amount that does not fit the picture the bank has of you can trigger that review.

To you it feels like distrust, but at its core it is an information problem: the bank sees an amount coming in without the origin being traceable for it. As long as that origin is not substantiated, the bank often keeps the account on hold. The solution therefore rarely lies in discussion, and almost always in evidence. Banks act here within the European framework for combating money laundering, as described by the European Banking Authority.

What does a bank see as conclusive proof of origin?

A bank sees as conclusive proof of origin a traceable overview that covers the entire chain, from the first euro you put in to the deposit that was blocked. Loose screenshots of a wallet balance or a single exchange transaction rarely suffice. It is about coherence: can an outsider follow the route and does each step match the previous one? The underlying rules follow from the European approach to money laundering at EU level.

Specifically, a bank looks at purchase receipts and deposits from your own bank account, exchange overviews with date, amount and counterparty, the alignment between your on-chain transactions and your bank statements, and an explanation that makes the jumps in value or time understandable. This is what we call independently demonstrating the origin of your assets, and it differs materially from simply showing that you own crypto. Understanding what asset verification precisely involves is not that you prove the assets exist, but that you show where they came from and that they were lawfully obtained.

The chain of origin: from first purchase to deposit

Take a payment account that was blocked after a large crypto deposit. The chain does not begin with that deposit, but years earlier: with the first euro you sent from your salary account to an exchange. From there the route runs through purchases, possibly a few wallets, perhaps a switch to another exchange, and finally the sale and payout that landed in your bank account. When a bank blocks your account over crypto, a traceable origin file is often the fastest way back.

Every link in that route leaves a trail. By putting those trails in order, a substantiation of the origin of assets emerges that connects the deposit to a legitimate source. That is exactly the overview a bank needs in order to unblock.

How to build a file that matches what your bank wants to see

A file that matches what a bank wants to see is built in a fixed order. First you gather all exchange data: transaction history, deposits and withdrawals, export files where possible. Next you demonstrably link the wallets used to yourself, so it is clear that the intermediate addresses are yours and not those of a third party. When a bank blocks your account over crypto, a traceable origin file is often the fastest way back.

Next you map out the transaction chain: which amount went where and when, and how that aligns with your bank statements. Finally you bundle that into a traceable report that the bank can read in one go. This is work in which an independent party helps, because a report from a third party with no interest in the outcome carries more weight than a self-compiled overview. Anyone who previously had to demonstrate the origin of crypto assets to their bank recognises that it is not about more documents, but about coherence between the documents that already exist.

Substantiating, not advising: where our role ends

Paucitas substantiates and verifies the origin of your crypto assets and maps the transaction chain traceably. What we deliberately do not do is provide tax or legal advice. Whether tax is due on a certain amount belongs with a tax adviser; how you handle a dispute with the bank legally belongs with a lawyer. Anyone dealing with a bank that blocks their account over crypto is well advised to start building the file early.

That boundary is not a limitation but a mark of quality: precisely because we limit ourselves to the facts and the substantiation, a bank can use our report as a neutral building block in its own assessment. We deliver the proof of origin; the parties around it do their own work. Even when a bank blocks your account over crypto without a clear explanation, the core stays the same: making origin demonstrable.

Start with a free intake

If you have a blocked account and your bank asks for proof of origin, the first step is simple: map out what data already exists and what is still needed. During a free intake we look at your situation together and discuss which substantiation is achievable in your case, without any obligation. A bank blocking your account over crypto is unpleasant, but with a traceable file it is often well resolvable.

This way you quickly know whether a traceable origin file is within reach and what is needed for it, before you take further steps towards your bank.