Reconstruct Crypto Records Retrospectively
Traded crypto for years but never documented it? TX-Partner reconstructs your history as far back as the sources allow, in one case to 2013.
30 minutes · Consultation and quote free
Robert & Johannes · personally review your data
Reconstructing Crypto Records: When It Becomes Necessary
Blockchain data is permanent. TX-Partner reconstructs crypto histories years later, from on-chain data, exports and archives.
Can crypto transactions be tracked?
Yes. Wallet addresses are public and permanent, exchanges know you through KYC, and since 2026 EU crypto service providers record automatically (DAC8). First reports in 2027.
Years undocumented – crypto undocumented for years
Trading since 2017 or 2019 but never used a tax tool? TX-Partner reconstructs the entire history.
Exchange closed or hacked – exchange no longer available
FTX, Celsius or other platforms gone? Depending on what data is still available, TX-Partner works with exports, GDPR requests and on-chain data.
How dead exchanges are handled 04_DEFI_UNLABELEDDeFi never recorded – DeFi activity never documented
Liquidity pools, yield farming, bridges: all on-chain, none of it in the tax tool. TX-Partner catches up.
How DeFi history is rebuiltTax authority inquiry – received an inquiry from the tax authority
Letter from the tax authority? TX-Partner builds the retrospective crypto accounting as a reliable basis for your response.
Chaotic data situation
Dozens of wallets, several exchanges, no overview? TX-Partner brings structure into it and documents everything traceably.
Reconstructing crypto records yourself: where most people fail
A backlog of several years can be solved, but the effort grows with every year. Four points where doing it yourself usually breaks.
Exchange exports are not enough
CSV exports are often incomplete. Staking rewards are missing, and closed exchanges only deliver through a GDPR request to the insolvency administrator.
DeFi is a blind spot
DeFi protocols usually offer no export. Every transaction has to be researched on-chain, interpreted and classified.
The time needed is underestimated
Catching up three years means every chain on its own, every exchange on its own, every bridge with both sides. DeFi across chains even more so.
Errors compound
One wrong transaction in 2021 distorts the cost basis through 2026. The chronology has to hold from the start.
The gap is closed, not bridged.
Reconstructed, not patched
TX-Partner reconstructs what really happened on-chain. A lump-sum adjustment does not make the assignment correct, only invisible.
Fixed price after the analysis
TX-Partner looks at the data first, then you know the costs, before you place the order. No hourly rate, one fixed price for the quote.
Ready to hand over
One data set for three recipients: tax report, proof of funds, DAC8 reconciliation.
From the first question to a filing-ready history
Consultation
30 minutes with Robert or Johannes. Free.
Analysis
What is missing and how much work it will be. Free.
Offer at a fixed price
Price, steps and duration, in writing, before you place the order.
Collect the sources
Exchange exports, GDPR request, then on-chain data via the explorer.
Reconstruct and reconcile
Per asset, until the balance in the tool lands on the real balance.
Handover
One data set for tax report, proof of funds and DAC8. TX-Partner answers your tax advisor’s questions directly.
What TX-Partner takes on. What you provide.
TX-Partner takes on
- Finding and combining every source
- Reconstructing missing years on-chain, bridges with both sides
- Commenting openly on gaps that remain instead of bridging them
- The communication with your tax advisor, covered by the fixed price
You provide
- A list of every exchange and wallet, including your first
- Exports (CSV), as far as they still exist
- Wallet addresses from back then, a rough picture is enough to start
- Bank and credit card statements for your EUR deposits
None of it has to be complete. The consultation shows what is still there.
TX-Partner is a crypto accounting provider, not a tax advisory firm and not a tax tool. The tool calculates, your tax advisor advises, TX-Partner prepares the data.
The warning was in the wrong place
Where the warning was
A sale in CoinTracking with cost basis 0. The account was never in the negative, the transfers were paired.
Where the cause was
An uncovered acquisition, years earlier, on an entirely different exchange. A deposit inherits the cost basis of the paired withdrawal, so the gap travelled with it.
Where TX-Partner starts
Following the chain backwards to the first uncovered acquisition. That is where the reconstruction begins.
When Your Crypto History is Missing
Three clients, three gaps in the history. How much of it could be reconstructed.
“I have been in crypto since 2017 and honestly never documented anything. TX-Partner looked at it and gave me a clear overview of what needs to be done and how to approach it.”
“I was skeptical whether anyone could really handle my DeFi transactions. Liquidity Pools, bridges across multiple chains. They actually know their stuff.”
“I did not know exactly where I stood. TX-Partner reviewed my data and explained clearly where I am and what to watch out for.”
Genuine client reviews, collected via Trustpilot, LinkedIn and direct feedback after each project.
Crypto records retroactively reconstruct.
30 minutes that make the difference.
Book a consultation 30 minutes · Consultation and quote freeIf we are not the right fit for your case, we will say so in the call.
When More Than Just History is Missing
Crypto Voluntary Disclosure 2026
When does a voluntary disclosure make sense, what are the requirements and what role does documentation play?
Read articleDAC8 & Crypto Accounting
Since 2026, exchanges collect the data, with reporting from 2027. What this means for undocumented crypto histories and why catching up is becoming more urgent.
Read articleReconstruct Crypto History
Step-by-step practice guide: how to systematically rebuild missing data from on-chain sources, old exports, and wallet logs.
Read articleWhen the Tax Tool Isn't Enough
When Blockpit or CoinTracking shows errors that can't be resolved, it takes more than a tool.
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