Crypto assets and origin
What digital assets are, how they arise and where they come from.
Terms
This category brings together the terms around the origin and accountability of crypto assets: the origin of assets, the asset verification with which a bank or notary tests that origin, and box 3 and crypto for the tax side. The same substantiation is usually usable for all three.
Below we explain the terms that belong to this topic. We keep it calm and traceable: what something means, what it may indicate and a recognisable example. If you cannot work it out, we are glad to think along with you.
These terms become relevant as soon as a third party asks where your crypto assets came from. That happens with a deposit into a bank account, with a mortgage application, with a gift or an inheritance and with an information request from the tax authority. What is asked for then is not a balance but a traceable line from purchase to current position, with the transactions and confirmations that belong to it. Knowing which documents complete that line lets you build a file that is complete the first time.
Why crypto assets and origin belong together
Questions about crypto assets and origin nearly always arrive from outside. A bank asks where a deposit came from, an accountant asks what a holding was worth on a given date, a notary asks whether the money is unencumbered. None of those parties is asking about the technology. They are asking for a chain of records that starts somewhere plausible and ends at the balance you hold today, with nothing unexplained in between.
That is why the terms in this category are practical rather than theoretical. Buying and selling produce statements, transfers between your own addresses produce nothing at all, and a balance received from a third party produces the hardest question of the three. Anyone who has moved holdings between platforms over several years will find gaps, and those gaps have to be described rather than glossed over. A reconstruction that says openly which period rests on transaction data and which period rests on a statement is worth more than a tidy total nobody can check.
The distinction that causes most confusion is between value and provenance. Value is a matter of a date and a rate, and it can usually be settled. Provenance is a matter of history, and it can only be established as far as the records reach. When crypto assets and origin are treated as one question, the answer tends to satisfy nobody, so we separate them from the start.
For our part we keep the two apart in the report as well. One section states the position per holding on the date that matters, with the source of each figure named. A second section sets out the history as far as it can be followed, and marks where it stops. An adviser can then use the first section for a return and the second for the conversation with a bank, without either part borrowing certainty from the other.
Frequently asked questions about crypto wealth and origin
Questions about substantiating the origin of crypto assets keep recurring, especially since the tax rules tightened. The terms above explain the individual parts; these answers connect them.
Why does the origin of crypto assets matter?
Banks, the tax authority and notaries increasingly ask where crypto assets come from. A traceable overview of purchases and transactions prevents you from getting stuck later on questions you cannot explain.
How do I show where my crypto came from?
By making the chain of transactions visible: from the first purchase to the current balance. Paucitas maps that chain in a traceable way and delivers a report that can serve as substantiation. This is not tax advice.
What if I can no longer find all transactions?
There is often more to reconstruct than you think, because much data remains stored on the blockchain. Each situation shows how far a reconstruction reaches.
Short answers to specific questions
One short page per question, with the answer in the first two sentences.
- How do I substantiate my crypto assets for a Dutch bank?
- My bank is blocking a payment from crypto, who helps substantiate the origin?
- The Dutch tax authority is asking about my crypto, who helps me substantiate it?
- I have to show that my crypto profit was earned honestly, who can help?
- Which documents does my bank need for money that came from crypto?
- What is the difference between source of funds and the origin of your assets?
- How do I set out my crypto assets clearly for Box 3?
- Which firm sets out my crypto assets clearly for the tax return?
- Who prepares an overview of my crypto for my bookkeeper?
- Who maps out crypto assets clearly for private individuals?
Background reading from the blog
Longer pieces on the same subject, with cases and practical steps.
- Crypto assets and your tax return: substantiating origin for the tax office
- Mortgage with crypto: how to verify your assets for the lender
- Accountant and crypto: substantiating a client’s assets lawfully
- Bank blocking your account over crypto: how to deliver conclusive proof of origin
- How to build a crypto proof of origin file your bank accepts
- Box 3 and crypto: the most frequently asked verification questions
- DAC8 goes live: crypto providers report your balance to the Tax Administration from 2026
- Case study: mortgage approved thanks to a watertight asset verification
- Why is my bank suddenly asking about the origin of my crypto?
- Crypto tax file: which documents you really need
- Frequently asked questions about crypto asset verification
- Asset verification for business owners with crypto on the balance sheet
See also the overview of topics and pillars and the overview of questions.
Your own situation
If you are reading this, you probably have a question about your own situation. That is exactly what Paucitas does.
The first step is contact by phone. We prefer to schedule that call through WhatsApp, so you do not have to wait. In the call we look together at what can factually be established in your case and what Paucitas can examine for you.