Retrospective Documentation

Reconstruct Crypto Records Retrospectively

Traded crypto for years but never documented it? No problem.

Book Data Check

30 min · Free · No commitment

100% Crypto Data Experts
500+ Cases of Experience
8Years Professional Experience
Robert Thorn Johannes Anderl

Robert & Johannes · personally review your data

Starting Point

Can crypto transactions be tracked?

Yes – and from 2026 significantly sharper. Reason enough to have your history clean.

Three channels make crypto traceable.

01_CHAIN_OPEN

Your wallet addresses are public

Every transaction on BTC, ETH or Solana is public and permanent. If the tax office knows one of your addresses, it sees every move – often years back.

02_KYC_EXCHANGE

Your exchange knows you

Binance, Kraken, Bitpanda, Coinbase know you via KYC – ID, address, bank. Authorities request this data regularly. Bitcoin.de has already transferred concrete user data.

03_DAC8_AUTO

From 2026 your exchange reports automatically

From 2026 EU crypto service providers report automatically (DAC8). AT: KMG. DE: Kryptowerte-Steuertransparenzgesetz. First datasets: September 2027.

Common Scenarios

Reconstructing Crypto Records: When It Becomes Necessary

Blockchain data is permanent. TX-Partner reconstructs crypto histories years later – from on-chain, exports, and archives.

01_YEARS_MISSED

Years Undocumented • Crypto undocumented for years

Traded since 2017 or 2019 but never used a tax tool? TX-Partner reconstructs the entire history.

02_EXCHANGE_CLOSED

Exchange Closed or Hacked • Exchange no longer available

FTX, Celsius, or other platforms gone? TX-Partner works with on-chain data and archived sources.

Learn more
03_DEFI_UNLABELED

DeFi Never Recorded • DeFi activities never documented

Liquidity pools, yield farming, bridges – all on-chain, nothing in tax tool. TX-Partner catches up.

Learn more
04_TAX_INQUIRY

Tax Authority Inquiry • Received inquiry from tax authority

Letter from the tax authority? TX-Partner creates retrospective crypto accounting as a reliable basis for your response.

05_TOOL_SWITCH

Switched Tax Tools

From CoinTracking to Blockpit or vice versa? Historical data often gets lost in switches. TX-Partner bridges the gap.

06_MESSY_DATA

Chaotic Data Situation

Dozens of wallets, multiple exchanges, no overview? TX-Partner brings structure to chaos and documents everything transparently.

Common Obstacles

Reconstructing Crypto Transactions Yourself: Where Most People Fail

Four points where DIY usually breaks.

Exchange Exports Aren't Enough

CSV exports are often incomplete. Staking rewards missing, deleted exchanges provide nothing. A pure CSV strategy has gaps.

DeFi is a Blind Spot

DeFi protocols offer no CSV export. Every transaction must be manually researched on-chain, interpreted, and classified.

Time Effort Underestimated

Catching up 3+ years costs weeks of manual work. DeFi across multiple chains even more so.

Errors Compound

One wrong TX in 2021 distorts the cost basis through 2026. The chronology has to hold from the start.

What TX-Partner Delivers

From Review to Full-Service Crypto Accounting

Four stages. You choose how deep TX-Partner goes.

From Practice

When Your Crypto History is Missing

Crypto accounting, missing history, reconstruction – personal, experienced, on equal terms. Just what customers report.

★★★★★

"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."

ME
M. E. Data Check
★★★★★

"Top job. Quick and simple handling. Very good work."

T
Tobias DE
★★★★★

"I was initially in panic because lots of things were off in CoinTracking. Luckily everything was sorted in short time. Highly recommended."

OJ
Oliver Jany CoinTracking
★★★★★

"The collaboration is really enjoyable, and I notice that this year I am much less worried about handling my crypto accounting myself."

C
C. W. Crypto Doc
★★★★★

"My Blockpit report showed several discrepancies, especially unlabeled transactions and balance warnings. The support was competent and helpful."

L
L. M. Blockpit review
★★★★★

"My crypto transactions were entered cleanly, fully and traceably in Blockpit. Saved me a lot of time and effort."

KP
K. P. Crypto Doc
★★★★★

"I was skeptical whether anyone could really handle my DeFi transactions. Liquidity Pools, bridges across multiple chains. They actually know their stuff."

T
T. P. DeFi & Multi-Chain
★★★★★

"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."

FZ
FPZ Overview · AT
★★★★★

"Everything went fast and reliably. Communication established a serious and trusted basis from the start. Very satisfied with the result."

A
Anonymous Customer Direct customer feedback
★★★★★

"Very helpful. Where my tax advisor used to say 'better look that up yourself', the expertise of TX-Partner begins."

DZ
D. Z. Professional consultation
★★★★★

"TX-Partner helped me extremely competently and professionally in a particularly challenging situation with a tight deadline. Also human and empathic."

L
Lars IDOs & Presales
★★★★★

"Initially I was panicking because I had complex transactions and used many bridges across different chains. But then reassured. Years of experience."

J
Joy Bridges & Multi-Chain

Genuine client reviews, collected via Trustpilot, LinkedIn and direct feedback after each project.

Ready?

Crypto records retroactively reconstruct.

30 minutes that make the difference.

Book Data Check 30 min · Free · No commitment

500+ documented cases · 15+ years crypto experience

Common Questions

What You'll Want to Know

That's exactly the standard case for retrospective documentation. TX-Partner reconstructs via on-chain forensics (Etherscan, Solscan, Bitquery), archived exchange snapshots and bridge logs. Even if you only roughly remember which wallets or exchanges you used — that's usually enough as a starting point. More: When the Tax Tool Isn't Enough.
Account data from closed exchanges is no longer directly accessible. TX-Partner uses: archived web snapshots (Web Archive), publicly released data leaks (e.g. Mt. Gox), and on-chain addresses linked to the exchange. This makes your former trading history reconstructable to the extent data exists. Details: Reconstruct Exchange History.
On-chain to the genesis block of each chain (Bitcoin 2009, Ethereum 2015, etc.). For centralised exchanges it depends on available archives. Generally: most trades back to 2015 are reconstructable if wallet addresses are known. More in the blog article on reconstructing crypto history.
It depends on scope: number of sources (wallets, exchanges, chains), time period, complexity (Buy & Hold vs. DeFi). In the free Data Check, TX-Partner reviews your situation and gives you an honest upfront assessment. No hidden costs.
In the free Data Check (30 min), Robert or Johannes personally reviews your data situation: what's still there, what's missing, how far back can be reconstructed, and what it would cost. No sales pressure. Exactly what Step 1 (Professional Review) in the section above describes.
4–12 weeks depending on scope. History reconstruction is more involved than standard documentation because on-chain forensics is manual work. For urgent cases (tax deadline, bank inquiry) there is the option to expedite. Mention it directly in the Data Check.