Retrospective Documentation

Reconstruct Crypto Records Retrospectively

Traded crypto for years but never documented it? No problem. TX-Partner reconstructs your complete crypto documentation. Even retrospectively.

Free Documentation Check

Initial assessment of your crypto documentation · 30 min.

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Robert Thorn

Robert Thorn

 · Johannes Anderl

Johannes Anderl
Crypto documentation experts since 2021

Typical Starting Situations

These scenarios are common for TX-Partner. All are solvable.

Deep Dive

Better Late Than Never

Crypto transactions are stored on the blockchain – even years later. Using on-chain analysis, exchange exports, and archived data, TX-Partner systematically reconstructs your crypto documentation.

Request Check
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.

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.

04_TAX_INQUIRY

Tax Authority Inquiry • Received inquiry from tax authority

Letter from the tax authority? TX-Partner creates retrospective crypto documentation 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

Where Most People Fail

Those who try to document crypto retrospectively themselves quickly hit limits.

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

Documenting 3+ years retrospectively takes weeks of manual work. Without tool expertise and on-chain experience, it quickly becomes overwhelming.

Errors Compound

One wrong transaction in 2021 distorts the entire cost basis through 2026. Retrospective documentation must be chronologically correct – from the start.

Our Process

How Retrospective Documentation Works

1

Inventory Assessment

Record all used exchanges, wallets, DeFi protocols, and blockchains over the entire period.

2

Historical Reconstruction

Combine on-chain analysis, exchange exports, and archived data and cross-reference them.

3

Create Documentation

Prepare complete crypto documentation according to TX-Partner Documentation Standard.

Result: Complete, transparent crypto documentation – whether for tax advisors, tax authorities, or your own overview.

Quality Commitment

Also Retrospectively Documented – to Standard

COMPLETE
TRANSPARENT
technically CORRECT
USABLE

Even retrospectively documented crypto portfolios meet the TX-Partner Documentation Standard: complete, transparent, technically correct, long-term usable. Not just for this year, but as a stable foundation for future tax periods.

More about Documentation Standard
TX_VALIDATOR_V2
Input: Raw Data Faulty
Output: TX-Partner Documentation Standard
VERIFIED

From Practice

A real-world example: Transactions from 2018 to 2022, spread across Binance, Bittrex and a few DeFi protocols. Bittrex shut down in 2023, FTX went bankrupt – CSV exports are gone. Access credentials? Partially lost. Sounds like permanent data loss – but it's not. Through on-chain analysis, archived exchange data and wallet histories, a surprising amount can be reconstructed. Even without direct access, transactions remain verifiable on the blockchain.

Common Questions About Retrospective Documentation

How far back can TX-Partner document?

Basically as far back as blockchain data and exchange exports are available. In practice, this means: back to the start of your crypto activity – even if that was 2015 or earlier.

What if an exchange no longer exists?

Closed exchanges (e.g., FTX, Celsius) don't mean the data is lost. TX-Partner uses on-chain analysis, archived API data, and blockchain explorers to reconstruct missing transactions.

Does TX-Partner need access to all my exchanges and wallets?

TX-Partner needs exclusively read-only access (API keys without trading rights) and wallet addresses. Never passwords, private keys, or seed phrases. Which accesses are specifically needed is clarified in the Documentation Check.

On the Blog

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Crypto Documentation: The Complete Guide

Why crypto documentation is important and how it succeeds.
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DAC8 and Crypto Documentation

What the EU directive means for your crypto documentation.
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Reconstruct Crypto History

Restore missing transaction data step by step.
BLOG ARTICLE

Tax Authority Crypto Inquiry

What to do when receiving an inquiry from tax authorities about crypto transactions.

Reconstruct Crypto Retrospectively

Start with a free Documentation Check of your crypto history, as the basis for complete and transparent crypto documentation.

Free Documentation Check