Tax and Legal

If You Lose Some Documents, Rebuild the Tax File

By Walid Mograbi · 2026-04-07 · 2 min read

Losing one document is not a reason to guess; start by rebuilding the evidence trail clearly.

Why this lesson matters

Losing one document is not a reason to guess; start by rebuilding the evidence trail clearly.

The core idea

• Start with whatever proves the transaction itself: a bank statement, execution notice, or a message from the executing firm.
• Separate the proof of the asset from the proof of the costs, because fees and commissions need their own support inside the file.
• If a key document is missing, look for an official replacement or a copy from the original provider before relying on memory.

Practical example

If a trade receipt is missing, rebuild the record from the broker statement, transfer proof, and fee confirmation.

Common mistakes to avoid

• Relying on memory alone
• Mixing transaction proof with fee proof
• Skipping official replacement copies

What to do next

It reduces filing mistakes and makes your tax file easier to review later.

Important caution

This is a general UK explanation; do not replace a missing record with an estimate if a documented source can be recovered.

Further reading

• https://www.gov.uk/capital-gains-tax/records
• https://www.gov.uk/keeping-your-pay-tax-records