Reconstruction and Validation of Cryptocurrency Transactions

What is crypto transaction reconstruction and cleansing?

The reconstruction and reconciliation of cryptocurrency transactions is the process of retrieving, organizing, and correcting a history of cryptocurrency activity when the available information is fragmented, incomplete, or contains inconsistencies.

Over the years, it is common for transactions to be spread across multiple exchanges, personal wallets, DeFi protocols, and different blockchain networks. Added to this are platform changes, registration errors, misclassified transfers, duplicate transactions, or time periods for which documentation is no longer readily available.

When this happens, the taxpayer loses a clear picture of their actual business activity, and problems such as the following arise:

• Unidentified transactions.
• Balances that don’t add up.
• Incomplete records.
• Differences Between Platforms.
• Inability to account for certain transactions.

This situation affects both experienced investors and users who began trading without anticipating that, years later, they would need to reconstruct their entire trading history for tax purposes.

As part of a sound strategy for cryptocurrency tax strategy, reconstruction serves as the starting point for any subsequent analysis.

When a request from the Tax Agency arises, a tax adjustment is required, or there is a need to account for the source and movement of funds, having a solid documentary foundation is no longer an option—it becomes a necessity.

That is precisely where this service comes in: before filing a tax return, before submitting a tax report, and before defending a tax position before the tax authorities.

When is crypto reconstruction and cleansing necessary?

Reconstructing crypto operations becomes particularly important when the available data no longer allows for an accurate understanding of what has actually happened over time.

Our experience shows that the most common problems arise when:

• Multiple exchanges have been used over the past several years.
• There are private wallets that have no clear connection to centralized platforms.
• Transactions have been carried out using DeFi protocols.
• There have been cross-chain asset transfers.
• There have been forks, bridges, or network changes.
• Complete records are missing, or there are periods for which no reliable information is available.
• Old access credentials or records have been lost.

In these situations, attempting to prepare a tax return or conduct a tax analysis directly often leads to additional errors.

Inconsistent information carries over into all subsequent calculations and increases the risk of problems with the government.

What happens when part of your crypto history is missing, recorded incorrectly, or doesn’t add up?

A large portion of tax disputes involving cryptocurrencies do not stem from incorrect taxation, but rather from the inability to properly reconstruct what happened.

When data is missing or there are inconsistencies, problems such as the following may arise:

• Differences between historical and current balances.
• Duplicated operations.
• Internal transfers incorrectly treated as sales.
• Omitted returns.
• Incorrectly calculated gains or losses.
• Difficulties in proving the origin of certain assets.

Each year, the Tax Agency increases the number of cross-checks of information received from exchanges, financial institutions, and reporting forms. As a result, technical inconsistencies can end up becoming a more far-reaching tax issue.

Rebuilding and debugging allow us to detect these errors before they lead to more serious consequences.

Our experience working on complex operations has made us specialists in recovering records that initially seemed impossible to reconstruct, restoring clarity, order, and traceability to the information.

What are the benefits of a well-executed crypto reconstruction and/or pruning?

Reconstruction is not an end in itself.

Its true value lies in providing a solid foundation on which to build any subsequent tax action.

A professional reconstruction allows you to:

• Regain actual control over operations.
• To know exactly what assets you have owned and when.
• Identify historical errors.
• Avoid incorrect calculations.
• To make it easier to file future tax returns.
• Minimize risks related to tax authority requirements.
• Have reliable information available for any tax analysis.

In addition, it provides a comprehensive and coherent overview of the activities carried out over time.